Not a joke... had to take care of the Google/Youtube business relationship. With that out of the way
If you could just add subscriptions (sorry don't know the exact english word) to youtube content I'll consider the youtube thing out of the way

.
To be honnest, I'm not a fan of youtube, using it only to see daily TV zapping via subscription. To have that on the wdtv I've to go on the PC and update my playlist before seeing new content on the WDTV...
But do not forget your main priority

, which is ...... autoframerate or at least an easy way to change it while watching the media.