This video had more than one black screen with white text on it, but apparently when it was uploaded here it lost all but the first one.
All they say are:
"Biped Walk Cycles"
"Quadruped Walk Cycles"
And then the credits at the end, which gave tribute to the shows Futurama and Daria, where the voice clips came from, and the creator of the song.
The song is actually a remix done by DJPretzel of OCremix.org, entitled Pachelbel's Ganon. It's a remix of music from Pachelbel's Canon and a couple themes from the video game series "The Legend of Zelda." If you like video games, remixes, or just plain musical awesomeness, check that website out.