[02:41] The Arduino is a fairly small device. Except when it isn't.
[00:25] People run Doom on pretty much anything that can display pixels. A new point on the list is the Windows Task Manager. (see also)
[04:36] If you are interested in Sudoku, there is a YouTube channel you might like, called Cracking The Cryptic. Here is an example of what their videos are like, with a link to the Sudoku in the description below. I find it fascinating to watch a brain at work, so to speak (and the pure joy and excitement when something becomes clear). Also I like to try the puzzles myself, but most are just above my level.