Watch videos in VLC on your Mac and play the audio over AirPlay. No need for a sub-par video player.
It works with local files and YouTube. This means you can watch any .avi, .mkv, .mp4 you have, but it also works with YouTube, Vimeo and quite a few other online videos. Select files on your Mac and drag them all over to AirVLC. If you select multiple files, VLC will automatically put them in a playlist.
The same goes for online videos. Just drag the thumbnail or link onto AirVLC and it’ll handle the rest.