[video_player_platform_interface] Adds setter for allowing background playback This PR is a subset of #9212 - it only adds platform interface changes. Partially resolves #62739.

packages/video_player/video_player_platform_interface/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## NEXT
 
 * Updates minimum supported SDK version to Flutter 3.27/Dart 3.6.
+* Implements background playback functionality using allowBackgroundPlayback option.
 
 ## 6.3.0
 

packages/video_player/video_player_platform_interface/lib/video_player_platform_interface.dart

@@ -117,6 +117,12 @@ abstract class VideoPlayerPlatform extends PlatformInterface {
     throw UnimplementedError('setMixWithOthers() has not been implemented.');
   }
 
+  /// Sets the audio mode to allow background playback.
+  Future<void> setAllowBackgroundPlayback(bool allowBackgroundPlayback) {
+    throw UnimplementedError(
+        'setAllowBackgroundPlayback() has not been implemented.');
+  }
+
   /// Sets additional options on web.
   Future<void> setWebOptions(int playerId, VideoPlayerWebOptions options) {
     throw UnimplementedError('setWebOptions() has not been implemented.');

packages/video_player/video_player_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/packages/tree/main/packages/video_player/
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+video_player%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 6.3.0
+version: 6.4.0
 
 environment:
   sdk: ^3.6.0