https://devstreaming-cdn.apple.com/videos/wwdc/2019/103bax22h2udxu0n/103/103_hd_platforms_state_of_the_union.mp4?dl=1
    out=[2019] [Session 103] Platforms State of the Union.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/104d6zyhb21vki/104/104_hd_apple_design_awards.mp4?dl=1
    out=[2019] [Session 104] Apple Design Awards.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/202mm1h4jl4wiz1h3/202/202_hd_using_core_data_with_cloudkit.mp4?dl=1
    out=[2019] [Session 202] Using Core Data With CloudKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/203d4wzq0eky2pgtir3/203/203_hd_introducing_desktopclass_browsing_on_ipad.mp4?dl=1
    out=[2019] [Session 203] Introducing Desktop-class Browsing on iPad.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/204isgnpbqud244/204/204_hd_introducing_swiftui_building_your_first_app.mp4?dl=1
    out=[2019] [Session 204] Introducing SwiftUI - Building Your First App.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/205uk2opbsrhdunlbn/205/205_hd_introducing_ipad_apps_for_mac.mp4?dl=1
    out=[2019] [Session 205] Introducing iPad Apps for Mac.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/206u451oe8jmzj52/206/206_hd_introducing_sf_symbols.mp4?dl=1
    out=[2019] [Session 206] Introducing SF Symbols.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/207k9p5h61k6sovy6hr/207/207_hd_introducing_sirikit_media_intents.mp4?dl=1
    out=[2019] [Session 207] Introducing SiriKit Media Intents.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/208ryw5t6xyu0a6/208/208_hd_creating_independent_watch_apps.mp4?dl=1
    out=[2019] [Session 208] Creating Independent Watch Apps.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/209w6qieg12bqlrpjzu/209/209_hd_whats_new_in_machine_learning.mp4?dl=1
    out=[2019] [Session 209] What's New in Machine Learning.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/210fo5cr4fwdfn0/210/210_hd_whats_new_in_appkit_for_macos.mp4?dl=1
    out=[2019] [Session 210] What’s New in AppKit for macOS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/211p61zvgdkn99y/211/211_hd_mastering_the_living_room_with_tvos.mp4?dl=1
    out=[2019] [Session 211] Mastering the Living Room With tvOS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/212nyxqyrke8a9t/212/212_hd_introducing_multiple_windows_on_ipad.mp4?dl=1
    out=[2019] [Session 212] Introducing Multiple Windows on iPad.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/213q1mftanbup84jc/213/213_hd_introducing_parameters_for_shortcuts.mp4?dl=1
    out=[2019] [Session 213] Introducing Parameters for Shortcuts.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/214iqtpuhih53fw2/214/214_hd_implementing_dark_mode_on_ios.mp4?dl=1
    out=[2019] [Session 214] Implementing Dark Mode on iOS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/215wh1hurdxwcctfc8/215/215_hd_advances_in_collection_view_layout.mp4?dl=1
    out=[2019] [Session 215] Advances in Collection View Layout.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/216oe5ad0gu7zw8cqfd/216/216_hd_swiftui_essentials.mp4?dl=1
    out=[2019] [Session 216] SwiftUI Essentials.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/217hlrq3o5glluc/217/217_hd_researchkit_and_carekit_reimagined.mp4?dl=1
    out=[2019] [Session 217] ResearchKit and CareKit Reimagined.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/218cnjfazt0v1am/218/218_hd_exploring_new_data_representations_in_healthkit.mp4?dl=1
    out=[2019] [Session 218] Exploring New Data Representations in HealthKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/219s60i7y7dovs8r4/219/219_hd_swiftui_on_watchos.mp4?dl=1
    out=[2019] [Session 219] SwiftUI on watchOS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/220xl4hxzzr7b19/220/220_hd_advances_in_ui_data_sources.mp4?dl=1
    out=[2019] [Session 220] Advances in UI Data Sources.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/221xy1ko7h8ub79is/221/221_hd_introducing_pencilkit.mp4?dl=1
    out=[2019] [Session 221] Introducing PencilKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/222z7uanb8bo1e/222/222_hd_understanding_images_in_vision_framework.mp4?dl=1
    out=[2019] [Session 222] Understanding Images in Vision Framework.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/223ignoocw8xnuqx5di/223/223_hd_expanding_the_sensory_experience_with_core_haptics.mp4?dl=1
    out=[2019] [Session 223] Expanding the Sensory Experience with Core Haptics.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/224xnuourakjstfak/224/224_hd_modernizing_your_ui_for_ios_13.mp4?dl=1
    out=[2019] [Session 224] Modernizing Your UI for iOS 13.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/225dh4oy0vvscxxr/225/225_hd_advances_in_camera_capture__photo_segmentation.mp4?dl=1
    out=[2019] [Session 225] Advances in Camera Capture & Photo Segmentation.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/226mq9pvm28zqfqer2a/226/226_hd_data_flow_through_swiftui.mp4?dl=1
    out=[2019] [Session 226] Data Flow Through SwiftUI.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/227a5yni0swztyj0/227/227_hd_font_management_and_text_scaling.mp4?dl=1
    out=[2019] [Session 227] Font Management and Text Scaling.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/228l55lz3fc9f4/228/228_hd_creating_great_apps_using_core_ml_and_arkit.mp4?dl=1
    out=[2019] [Session 228] Creating Great Apps Using Core ML and ARKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/230p2cw8ht4ow4invto/230/230_hd_making_apps_with_core_data.mp4?dl=1
    out=[2019] [Session 230] Making Apps with Core Data.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/231qbm6xl2bbd5t/231/231_hd_integrating_swiftui.mp4?dl=1
    out=[2019] [Session 231] Integrating SwiftUI.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/232kg63jt891ci/232/232_hd_advances_in_natural_language_framework.mp4?dl=1
    out=[2019] [Session 232] Advances in Natural Language Framework.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/233zklqtgixxmuulng/233/233_hd_mastering_xcode_previews.mp4?dl=1
    out=[2019] [Session 233] Mastering Xcode Previews.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/234rye7511ohnx5dmvl/234/234_hd_text_recognition_in_vision_framework.mp4?dl=1
    out=[2019] [Session 234] Text Recognition in Vision Framework.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/235piwr25l1xxn6/235/235_hd_taking_ipad_apps_for_mac_to_the_next_level.mp4?dl=1
    out=[2019] [Session 235] Taking iPad Apps for Mac to the Next Level.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/236an22jpbgtmv9ya/236/236_hd_whats_new_in_mapkit_and_mapkit_js.mp4?dl=1
    out=[2019] [Session 236] What’s New in MapKit and MapKit JS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/237x70rryl2b933v/237/237_hd_building_custom_views_with_swiftui.mp4?dl=1
    out=[2019] [Session 237] Building Custom Views with SwiftUI.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/238w8avpcuaf5ox/238/238_hd_accessibility_in_swiftui.mp4?dl=1
    out=[2019] [Session 238] Accessibility in SwiftUI.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/239lnmy9z9ulgdrcej/239/239_hd_great_developer_habits.mp4?dl=1
    out=[2019] [Session 239] Great Developer Habits.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/240kqdx1bcyovfjoz/240/240_hd_swiftui_on_all_devices.mp4?dl=1
    out=[2019] [Session 240] SwiftUI On All Devices.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/241j0ejuokeaycdis/241/241_hd_adding_indoor_maps_to_your_app_and_website.mp4?dl=1
    out=[2019] [Session 241] Adding Indoor Maps to your App and Website.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/243ce6ir170wt9zmal/243/243_hd_integrating_with_siri_event_suggestions.mp4?dl=1
    out=[2019] [Session 243] Integrating with Siri Event Suggestions.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/244gmopitz5ezs2kkq/244/244_hd_visual_design_and_accessibility.mp4?dl=1
    out=[2019] [Session 244] Visual Design and Accessibility.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/245hrnwbhlkgmim8y/245/245_hd_introducing_the_indoor_maps_program.mp4?dl=1
    out=[2019] [Session 245] Introducing the Indoor Maps Program.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/246bnifwqasd17ytre/246/246_hd_window_management_in_your_multitasking_app.mp4?dl=1
    out=[2019] [Session 246] Window Management in Your Multitasking App.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/247cie5skcsefhpnhxq/247/247_hd_whats_new_in_classkit.mp4?dl=1
    out=[2019] [Session 247] What’s New in ClassKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/248ts94v3ev4q5/248/248_hd_creating_an_accessible_reading_experience.mp4?dl=1
    out=[2019] [Session 248] Creating an Accessible Reading Experience.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/249a0jw909n3uq0/249/249_hd_introducing_multicamera_capture_for_ios.mp4?dl=1
    out=[2019] [Session 249] Introducing Multi-Camera Capture for iOS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/250iaz7b18msfiy/250/250_hd_making_apps_more_accessible_with_custom_actions.mp4?dl=1
    out=[2019] [Session 250] Making Apps More Accessible With Custom Actions.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/251jiw68lhjtoxak/251/251_hd_extended_runtime_for_watchos_apps.mp4?dl=1
    out=[2019] [Session 251] Extended Runtime for watchOS Apps.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/252ogueb17a2lv/252/252_hd_advances_in_carplay_systems.mp4?dl=1
    out=[2019] [Session 252] Advances in CarPlay Systems.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/253llfvak2onhcnjf3w/253/253_hd_exploring_tinted_graphic_complications.mp4?dl=1
    out=[2019] [Session 253] Exploring Tinted Graphic Complications.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/254fml0e526wtu2/254/254_hd_writing_great_accessibility_labels.mp4?dl=1
    out=[2019] [Session 254] Writing Great Accessibility Labels.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/256p7m9z4yst71ai/256/256_hd_advances_in_speech_recognition.mp4?dl=1
    out=[2019] [Session 256] Advances in Speech Recognition.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/257zstehah872m64ht5/257/257_hd_accessibility_inspector.mp4?dl=1
    out=[2019] [Session 257] Accessibility Inspector.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/258ggtahutefvsda35yt/258/258_hd_architecting_your_app_for_multiple_windows.mp4?dl=1
    out=[2019] [Session 258] Architecting Your App for Multiple Windows.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/259hnbafsdcioplsf653f/259/259_hd_targeting_content_with_multiple_windows.mp4?dl=1
    out=[2019] [Session 259] Targeting Content with Multiple Windows.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/260dn5488jol0b/260/260_hd_introducing_photo_segmentation_mattes.mp4?dl=1
    out=[2019] [Session 260] Introducing Photo Segmentation Mattes.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/261p8np41tos4h2/261/261_hd_large_content_viewer_ensuring_readability_for_everyone.mp4?dl=1
    out=[2019] [Session 261] Large Content Viewer - Ensuring Readability for Everyone.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/262piyu998eqe22u/262/262_hd_embedding_and_sharing_visually_rich_links.mp4?dl=1
    out=[2019] [Session 262] Embedding and Sharing Visually Rich Links.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/301xxdtu2sikt7naxe/301/301_hd_whats_new_in_app_store_connect.mp4?dl=1
    out=[2019] [Session 301] What's New in App Store Connect.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/302e9g1j6q9w575y3/302/302_hd_inapp_purchases_and_using_servertoserver_notifications.mp4?dl=1
    out=[2019] [Session 302] In-App Purchases and Using Server-to-Server Notifications.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/303te9o8pf35qp/303/303_hd_whats_new_in_managing_apple_devices.mp4?dl=1
    out=[2019] [Session 303] What’s New in Managing Apple Devices.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/304uxy73xvmgt37/304/304_hd_app_distribution__from_adhoc_to_enterprise.mp4?dl=1
    out=[2019] [Session 304] App Distribution – From Ad-hoc to Enterprise.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/305k64jjy5srpt9o/305/305_hd_subscription_offers_best_practices.mp4?dl=1
    out=[2019] [Session 305] Subscription Offers Best Practices.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/401dpvu3x1d3hgg5i6/401/401_hd_whats_new_in_xcode_11.mp4?dl=1
    out=[2019] [Session 401] What's New in Xcode 11.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/402fd460n3p3w5c/402/402_hd_whats_new_in_swift.mp4?dl=1
    out=[2019] [Session 402] What's New in Swift.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/403n9n5z0vd71jw4q2/403/403_hd_creating_great_localized_experiences_with_xcode_11.mp4?dl=1
    out=[2019] [Session 403] Creating Great Localized Experiences with Xcode 11.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/404w05ssefca567rh/404/404_hd_getting_started_with_xcode.mp4?dl=1
    out=[2019] [Session 404] Getting Started with Xcode.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/405sz7ct71lrflqb/405/405_hd_swift_playgrounds_3.mp4?dl=1
    out=[2019] [Session 405] Swift Playgrounds 3.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/408bmshwds7eoqow1ud/408/408_hd_adopting_swift_packages_in_xcode.mp4?dl=1
    out=[2019] [Session 408] Adopting Swift Packages in Xcode.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/409t7ah0xy3ocqab4a/409/409_hd_whats_new_in_clang_and_llvm.mp4?dl=1
    out=[2019] [Session 409] What's New in Clang and LLVM.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/410p24ercmpgj258x/410/410_hd_creating_swift_packages.mp4?dl=1
    out=[2019] [Session 410] Creating Swift Packages.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/411cbc60y12x68arcof/411/411_hd_getting_started_with_instruments.mp4?dl=1
    out=[2019] [Session 411] Getting Started with Instruments.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/412g1eatropvik82vk/412/412_hd_debugging_in_xcode_11.mp4?dl=1
    out=[2019] [Session 412] Debugging in Xcode 11.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/413kpguqjv5fqp9/413/413_hd_testing_in_xcode.mp4?dl=1
    out=[2019] [Session 413] Testing in Xcode.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/414ipe55m84vk1h53/414/414_hd_developing_a_great_profiling_experience.mp4?dl=1
    out=[2019] [Session 414] Developing a Great Profiling Experience.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/415zrx4f6t10b2/415/415_hd_modern_swift_api_design.mp4?dl=1
    out=[2019] [Session 415] Modern Swift API Design.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/416h8485aty341c2/416/416_hd_binary_frameworks_in_swift.mp4?dl=1
    out=[2019] [Session 416] Binary Frameworks in Swift.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/417vjfis9nusyysvl/417/417_hd_improving_battery_life_and_performance.mp4?dl=1
    out=[2019] [Session 417] Improving Battery Life and Performance.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/418o9bbtoe880sauh/418/418_hd_getting_the_most_out_of_simulator.mp4?dl=1
    out=[2019] [Session 418] Getting the Most Out of Simulator.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/419ef9ipua3hnd2y/419/419_hd_optimizing_storage_in_your_app.mp4?dl=1
    out=[2019] [Session 419] Optimizing Storage in Your App.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/420yz3f4ost5x9c/420/420_hd_drawing_classification_and_oneshot_object_detection_in_turi_create.mp4?dl=1
    out=[2019] [Session 420] Drawing Classification and One-Shot Object Detection in Turi Create.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/421pew36g0j6fv4jm/421/421_hd_modeling_in_custom_instruments.mp4?dl=1
    out=[2019] [Session 421] Modeling in Custom Instruments.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/422vrf3slx9wnqm6/422/422_hd_designing_for_adverse_network_and_temperature_conditions.mp4?dl=1
    out=[2019] [Session 422] Designing for Adverse Network and Temperature Conditions.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/423lzf3qsjedrzivc7/423/423_hd_optimizing_app_launch.mp4?dl=1
    out=[2019] [Session 423] Optimizing App Launch.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/424gsffe67thwyafre/424/424_hd_training_object_detection_models_in_create_ml.mp4?dl=1
    out=[2019] [Session 424] Training Object Detection Models in Create ML.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/425bfacxsewtyh8uye5/425/425_hd_training_sound_classification_models_in_create_ml.mp4?dl=1
    out=[2019] [Session 425] Training Sound Classification Models in Create ML.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/426s9m91e962yqv9/426/426_hd_building_activity_classification_models_in_create_ml.mp4?dl=1
    out=[2019] [Session 426] Building Activity Classification Models in Create ML.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/427quw6yo5agrbit/427/427_hd_training_recommendation_models_in_create_ml.mp4?dl=1
    out=[2019] [Session 427] Training Recommendation Models in Create ML.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/428c7jhmepea85p6tz/428/428_hd_training_text_classifiers_in_create_ml.mp4?dl=1
    out=[2019] [Session 428] Training Text Classifiers in Create ML.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/429s7ksrdjsg3bql/429/429_hd_lldb_beyond_po.mp4?dl=1
    out=[2019] [Session 429] LLDB - Beyond "po".mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/430tw6e8xtxo3btga2/430/430_hd_introducing_the_create_ml_app.mp4?dl=1
    out=[2019] [Session 430] Introducing the Create ML App.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/501psbqh02kzce/501/501_hd_reaching_the_big_screen_with_airplay_2.mp4?dl=1
    out=[2019] [Session 501] Reaching the Big Screen with AirPlay 2.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/502gzyuhh8p2r8g8/502/502_hd_introducing_lowlatency_hls.mp4?dl=1
    out=[2019] [Session 502] Introducing Low-Latency HLS.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/503tnc2gfty50jit92m/503/503_hd_delivering_intuitive_media_playback_with_avkit.mp4?dl=1
    out=[2019] [Session 503] Delivering Intuitive Media Playback with AVKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/506lqy7sprpfyo800/506/506_hd_hevc_video_with_alpha.mp4?dl=1
    out=[2019] [Session 506] HEVC Video with Alpha.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/507fk9wyls0np6piwk/507/507_hd_hls_authoring_for_airplay_2_video.mp4?dl=1
    out=[2019] [Session 507] HLS Authoring for AirPlay 2 Video.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/508kk896m9xoeaz1a/508/508_hd_modernizing_your_audio_app.mp4?dl=1
    out=[2019] [Session 508] Modernizing Your Audio App.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/509tdjld4pedsigr9/509/509_hd_auv3_extensions_user_presets.mp4?dl=1
    out=[2019] [Session 509] AUv3 Extensions User Presets.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/510v8txdlekug3npw2m/510/510_hd_whats_new_in_avaudioengine.mp4?dl=1
    out=[2019] [Session 510] What's New in AVAudioEngine.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/511e9x950grweijpm9y/511/511_hd_supporting_dark_mode_in_your_web_content.mp4?dl=1
    out=[2019] [Session 511] Supporting Dark Mode in Your Web Content.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/513w02gjyhgbk02/513/513_hd_understanding_cpu_usage_with_web_inspector.mp4?dl=1
    out=[2019] [Session 513] Understanding CPU Usage with Web Inspector.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/514u8cpyqzkiznkm1/514/514_hd_auditing_web_content_with_web_inspector.mp4?dl=1
    out=[2019] [Session 514] Auditing Web Content with Web Inspector.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/515nm8yj4zy65h15/515/515_hd_whats_new_in_safari.mp4?dl=1
    out=[2019] [Session 515] What's New in Safari.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/516sogw464mg6d4uv/516/516_hd_whats_new_in_authentication.mp4?dl=1
    out=[2019] [Session 516] What's New in Authentication.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/518lfev1wbktx9/518/518_hd_whats_new_for_web_developers.mp4?dl=1
    out=[2019] [Session 518] What's New for Web Developers.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/520gfafwrte8ytre/520/520_hd_introducing_core_haptics.mp4?dl=1
    out=[2019] [Session 520] Introducing Core Haptics.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/601fthb9otw94fg/601/601_hd_modern_rendering_with_metal.mp4?dl=1
    out=[2019] [Session 601] Modern Rendering with Metal.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/602ytoojud5i0kfnj4n/602/602_hd_working_with_usd.mp4?dl=1
    out=[2019] [Session 602] Working with USD.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/603y6t9wal4i9m/603/603_hd_introducing_realitykit_and_reality_composer.mp4?dl=1
    out=[2019] [Session 603] Introducing RealityKit and Reality Composer.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/604o2yt9ky18mbyd/604/604_hd_introducing_arkit_3.mp4?dl=1
    out=[2019] [Session 604] Introducing ARKit 3.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/605a9razz1cphz/605/605_hd_building_apps_with_realitykit.mp4?dl=1
    out=[2019] [Session 605] Building Apps with RealityKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/606j537qmnh6o6/606/606_hd_delivering_optimized_metal_apps_and_games.mp4?dl=1
    out=[2019] [Session 606] Delivering Optimized Metal Apps and Games.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/607a2lcl8lpd7fnidym/607/607_hd_bringing_people_into_ar.mp4?dl=1
    out=[2019] [Session 607] Bringing People into AR.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/608ycxyv84z8ap14wot/608/608_hd_metal_for_pro_apps.mp4?dl=1
    out=[2019] [Session 608] Metal for Pro Apps.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/609zbao33tlyym/609/609_hd_building_ar_experiences_with_reality_composer.mp4?dl=1
    out=[2019] [Session 609] Building AR Experiences with Reality Composer.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/610bh5ws7sw7lxoo/610/610_hd_building_collaborative_ar_experiences.mp4?dl=1
    out=[2019] [Session 610] Building Collaborative AR Experiences.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/611h7e9ka5i87k5ya/611/611_hd_bringing_opengl_apps_to_metal.mp4?dl=1
    out=[2019] [Session 611] Bringing OpenGL Apps to Metal.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/612umedd7bboc1/612/612_hd_advances_in_ar_quick_look.mp4?dl=1
    out=[2019] [Session 612] Advances in AR Quick Look.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/613vjxxrkq20jn/613/613_hd_ray_tracing_with_metal.mp4?dl=1
    out=[2019] [Session 613] Ray Tracing with Metal.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/614o3sph3xudzgm6/614/614_hd_metal_for_machine_learning.mp4?dl=1
    out=[2019] [Session 614] Metal for Machine Learning.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/615zdym8i4v282u/615/615_hd_game_center_player_identifiers.mp4?dl=1
    out=[2019] [Session 615] Game Center Player Identifiers.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/616my96cpgv09ab5lq/616/616_hd_supporting_new_game_controllers.mp4?dl=1
    out=[2019] [Session 616] Supporting New Game Controllers.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/701ngx868rfo8jlj/701/701_hd_advances_in_macos_security.mp4?dl=1
    out=[2019] [Session 701] Advances in macOS Security.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/702vygott3n041/702/702_hd_system_extensions_and_driverkit.mp4?dl=1
    out=[2019] [Session 702] System Extensions and DriverKit.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/703yqvyjv9mi5ur6/703/703_hd_all_about_notarization.mp4?dl=1
    out=[2019] [Session 703] All About Notarization.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/704t1nfga5vi1x60x/704/704_hd_core_ml_3_framework.mp4?dl=1
    out=[2019] [Session 704] Core ML 3 Framework.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/705lx74ghrsthpyfude/705/705_hd_whats_new_in_core_location.mp4?dl=1
    out=[2019] [Session 705] What's New in Core Location.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/706sgor5wzq9m15o2r0/706/706_hd_introducing_sign_in_with_apple.mp4?dl=1
    out=[2019] [Session 706] Introducing Sign In with Apple.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/707smbqns2s4u1v49bn/707/707_hd_advances_in_app_background_execution.mp4?dl=1
    out=[2019] [Session 707] Advances in App Background Execution.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/708pnd9swz5hx9anljy/708/708_hd_designing_for_privacy.mp4?dl=1
    out=[2019] [Session 708] Designing for Privacy.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/709uek5h4l7kaefk2oh/709/709_hd_cryptography_and_your_apps.mp4?dl=1
    out=[2019] [Session 709] Cryptography and Your Apps.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/710aunvynji5emrl/710/710_hd_whats_new_in_apple_file_systems.mp4?dl=1
    out=[2019] [Session 710] What's New in Apple File Systems.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/712oixq9dtsljwqxm/712/712_hd_advances_in_networking_part_1.mp4?dl=1
    out=[2019] [Session 712] Advances in Networking, Part 1.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/713b310k72bjpcmz6xn/713/713_hd_advances_in_networking_part_2.mp4?dl=1
    out=[2019] [Session 713] Advances in Networking, Part 2.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/714kr380j0vbvxv/714/714_hd_network_extensions_for_the_modern_mac.mp4?dl=1
    out=[2019] [Session 714] Network Extensions for the Modern Mac.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/715qg6xyd3qgplhd3m/715/715_hd_core_nfc_enhancements.mp4?dl=1
    out=[2019] [Session 715] Core NFC Enhancements.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/716z5h7lh9mzhl/716/716_hd_streaming_audio_on_watchos_6.mp4?dl=1
    out=[2019] [Session 716] Streaming Audio on watchOS 6.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/717b3lem5m2glj/717/717_hd_whats_new_in_universal_links.mp4?dl=1
    out=[2019] [Session 717] What's New in Universal Links.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/718sn5zybluwhbuq/718/718_hd_introducing_accelerate_for_swift.mp4?dl=1
    out=[2019] [Session 718] Introducing Accelerate for Swift.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/719dyb631z49zpjzk/719/719_hd_whats_new_in_file_management_and_quick_look.mp4?dl=1
    out=[2019] [Session 719] What’s New in File Management and Quick Look.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/720yo3jm1qljmlbddac/720/720_hd_whats_new_in_safari_extensions.mp4?dl=1
    out=[2019] [Session 720] What's New in Safari Extensions.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/721ga0kflgr4ypfx/721/721_hd_combine_in_practice.mp4?dl=1
    out=[2019] [Session 721] Combine in Practice.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/722l6blhn0efespfgx/722/722_hd_introducing_combine.mp4?dl=1
    out=[2019] [Session 722] Introducing Combine.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/723ijngq6f3vi97/723/723_hd_advances_in_foundation.mp4?dl=1
    out=[2019] [Session 723] Advances in Foundation.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/802lc4xsb0ixszml/802/802_hd_designing_award_winning_apps_and_games.mp4?dl=1
    out=[2019] [Session 802] Designing Award Winning Apps and Games.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/803acsrw3066p43dqm/803/803_hd_designing_great_ml_experiences.mp4?dl=1
    out=[2019] [Session 803] Designing Great ML Experiences.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/805fgsgar5ertqwh8k/805/805_hd_building_great_shortcuts.mp4?dl=1
    out=[2019] [Session 805] Building Great Shortcuts.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/806xdewrgatyy46/806/806_hd_designing_great_shortcuts.mp4?dl=1
    out=[2019] [Session 806] Designing Great Shortcuts.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/808knty6w7kjssfl/808/808_hd_whats_new_in_ios_design.mp4?dl=1
    out=[2019] [Session 808] What's New in iOS Design.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/809fdcsntdrt6yhjk/809/809_hd_designing_ipad_apps_for_mac.mp4?dl=1
    out=[2019] [Session 809] Designing iPad Apps for Mac.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/810fdftstga66w4hfadq/810/810_hd_designing_audiohaptic_experiences.mp4?dl=1
    out=[2019] [Session 810] Designing Audio-Haptic Experiences.mp4
https://devstreaming-cdn.apple.com/videos/wwdc/2019/901myoscpux9y7nry55/901/901_hd_whats_new_in_core_bluetooth.mp4?dl=1
    out=[2019] [Session 901] What's New in Core Bluetooth.mp4