Yeah, I've seen the second one some months ago and it's really incredible what they did! I never was an artist and never will be, but what these guys did in their mind and ingame is more than just artistic! It's incredible.
Wonder how much time it needs to create such levels and also sync them to music?!
Ah yes. I saw some of those a pretty darn long time ago...Then i saw some again on YT recently, the ones you found. Awesome and epic all at once? Fuck yeah.