Bought years ago and I like the upgrades you've made recently. The click for sound works well for eg.
Have you thought about adding a playlist feature of sorts? It could be a tough one I'm sure. What about we give you a YouTube playlist and you give us a couple layout options;
1) wide view with thumbnails to the right of the video
2) thumbnails below
3) no thumbnails - just a playlist icon the user can click to see playlist

That would be a great addition!