# MDESupportsUniversalURLPlayback A Boolean value that indicates whether an app supports URL-based playback via a media device extension. ## Discussion Set this key to `true` in your media app’s `Info.plist` file to turn on the launch mode, which uses the remote device’s built-in media player to play a URL: ```xml MDESupportsUniversalURLPlayback ``` When you set this key to `true`, your app can start a playback session using with a media URL and the launch mode. The system routes the URL to the device’s built-in player without requiring a corresponding application on the remote device. If you don’t set this key to `true`, calls to with the launch mode fail. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)