OK, now that other people are posting, I'll throw my comments in here.
First off the ones I posted:
Mario Live: Even though they missed a sound cue, it's still pretty cool if you ask me. I'd like to pull of something similar in college, or maybe next year as a senior. Perhaps Sonic?
Nintendo a Capella: One of the first "cool videos" I saw, and still one of my favorites. Zelda and Tetris are the best bits, IMO.
Sonic for Piano: I want to learn how to do that. Unfortunately, I suck at piano.
While My Ukulele Gently Weeps:
'Nuff said.
Street Fighter: See "Ukulele" reaction
Cog: Rube Goldberg machines are awesome. They're like dominos, but different! The complexity of this particular one is mind boggling.
SSBM: All done in some sort of frame-by-frame debug mode, but still really cool.
Tetris: I used to be good, but never that good. Impressive classic gaming at its best, really.
Driving: If I didn't care about the risk of damaging my car, I would do this, but the risk of me screwing up is enough of a reason not to try.
Canon in D: Beautiful song, and an amazing performance for sure. Just plain awesome.
Ninjas: People like this make me wish I had some sort of athletic ability, but I don't.
Now, on to TK's picks:
Japanese English: ROFL. That's just cruel, forcing them to watch that without laughing. It's still funny though.
Asian Backstreet: The music burns my eardrums, but the over-the-top style is hilarious.
Naruto/Ninja: Real Ninjas are ALWAYS FIGHTING. This key virtue! Ninja not need theme song if Ninja not fighting. Ninja must also speek in Broken English, or not real Ninja.
Soren: Sweet. Nothing terribly impressive IMO, but still sweet.
FF: wtf, m8?
Evolution of Dance: Garde~, you owe me a new keyboard; this one's now covered in Mt. Dew.
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