I’ve just released what would be best characterized as a mashup between youtube and reddit.

It is available at http://reddittv.elsewhat.com/ or through the chrome web store .

In essence it provides you with a youtube player which uses the social site reddit.com as the source for the playlist.
It uses the Youtube API and the Reddit API and is all done through client-side javascript coding.

Thanks to Salman Arshad which provided an example of a video player using the Youtube API. This became the base for my implementation.