Add support for setting MPV parameters in the Video player

[bl1nch]

Could you please add the ability to set MPV parameters in the Video player?

This feature could be implemented similarly to the approach described here: media-kit/media-kit#14 (comment)
API Reference: https://pub.dev/documentation/media_kit/latest/media_kit/NativePlayer/setProperty.html

final player = Player();
if (player.platform is NativePlayer) {
  await (player.platform as dynamic).setProperty('prop-name', 'prop-value');
}

[bl1nch]

It would also be nice if the Video player had the ability to play some Media directly, without creating a playlist, like this:

Video().play(VideoMedia("source"))