2 videos worth your time:
"A Million Ways" by OK Go
"Casimir Pulaski Day" by Sufjan Stevens
Machinima video created with footage from The Sims 2 PC game.
I may have to get this album. I've never heard anything from Ok Go before that I really enjoyed but there are a couple songs on this that are really sinking their claws into my psyche.
Of course you've heard of Sufjan!