I consider YouTube (or rather, video in general) a fantastic platform for showcasing something cool, demonstrating what it can do, and even demonstrating how to drive a piece of software - but for actual technical learning I loathe the video format - it's so hard to skim, re-read, pause, recap and digest at your own speed.

The best compromise seems to be webpages with readable technical info and animated video illustrations - such as the one posted here yesterday about how radio works.