Note: I just wanted to organize this on my own and I'm trying to do it right. This is all almost full YouTube ID informations. I've eliminated most useless outdated info and tried to correct many errors on descriptions. Original owner goes to AgentOak, and thanks for most updates to Martin Eesmaa and the incredible internet community. :>
See the credits and also special thanks in below.
Last updated: 19 February 2026
Also known as itag or format codes and way back they could be specified with the fmt parameter (e.g. &fmt=22).
Depending on the age and/or popularity of the video, not all formats will be available.