From the video's caption: PS3Tetris for the PS3, this is homebrew, so will only run on an JailBroken PS3, uses ooPo's toolchain, and PSL1GHT making it completely legal =-), this also takes advantage of the GPU, using the RSX for all rendering, which is awesome.
To quote: The video above is from an earlier state, the game is now nearly complete and created by me, and now released, so enjoy.
Source: have to fix 2 bugs first, then will release source.
1. Scores don't save (I don't know why yet!)
2. Attempting to play in 480p causes the PS3 to crash! (Not a clue on this one either)
Well, I need some sleep now! Hopefully you guys well find some fun out of it!