Interesting clip. I did notice a significant change in Beavis's voice as mentioned previously. It wasn't so much off, but Beavis sounding just a tad more intelligent then usual.
If Mike Judge does reboot Beavis and Butthead, I'd like to see more of a storyline than a string of events tied in with a slew of Music Videos with an MST3K-like commentary, mocking the videos in question. I never really liked the music video formula and quickly got lost with the story because of that.