In which I play "Speed Puzzle" a game release in 1988 by Harald Hoeppner. This is a Tetris game which offers the possibility of playing head-to-head. I suspect that might be the real appeal of the game, and I wasn't able to really explore that aspect of it. As a single player game, it's alright. Not too challenging, and a bit odd as a Tetris game because there are a number of strange pieces, as well as a lack of mirror-image ones like the "Z" and the "L".
There are 293 views in 6 videos for Tetris. His channel uploaded an hours worth of Tetris videos, making up less than 0.34% of the total overall content on Robert's Retro-Gaming's YouTube channel.