This thread is a continuation of Post a Cool Music Video (Part I). See How to use YouTube tags for instructions on how to post a video from YouTube. And I will start things off with....
Octavarium by Dream Theater
There's no good clips from the DVD, but here's the official trailer.
Sola Scriptura Trailer, Neal Morse
This is very strange. Using kitchen appliances as instruments to cover an '80s hit.
very good remix
This was banned for a while because somebody released the unsensored version of it on youtube. Now it's back again(censored version). Not sure if you're able to view it,
Youtube may have blocked certain countries from viewing it, not sure why. If you get the message your IP is blocked ... well bad luck I guess.
Seriously I haven't a clue what language that is.
but there's something about this video ... something that gets my blood pumping ...
maybe it's just the catchy tune 
IMO Glenn Gould was as good a piano player as ever lived. Bach's 'The Goldberg Variations' was his piece de resistance. Here's the first 7 variations, there's 25 in total, I think. This is part of his 2nd recording of this work, shortly before he died in the early '80s.