I don't think it's for searching. Unless I'm reading this wrong, it's to avoid complaints from TTC and Arika, because the only claim those two companies really have for any sort of copyright infringement is the use of the name "tetris". I reckon it's mainly directed at the fact that it's a video on a clone like Texmaster, and not a video on a TTC or Arika game.
i don't see what's wrong with avoiding flag issues by simply uploading unlisted videos to google video... ...except for the fact that they're going to stop uploads. dammit!
The new Wikipedia user who made this edit would disagree with that. (That was the user's first edit. A day later, I noticed the change on my Wikipedia watchlist and restored a semblance of balance.)
