media property
      
      set
      media
      (String value) 
      
    
    
Set media, can be url, file path, assets://path etc.
Implementation
set media(String value) {
  if (_media != value) {
    if (!_videoSize.isCompleted) {
      _videoSize.complete(null);
    }
    _videoSize = Completer<ui.Size?>();
  }
  _media = value;
  final cs = value.toNativeUtf8();
  _player.ref.setMedia
      .asFunction<void Function(Pointer<mdkPlayer>, Pointer<Char>)>()(
    _player.ref.object,
    cs.cast(),
  );
  malloc.free(cs);
}