WorldBuilding:YouTube

'Generic'
These are channels that whether or not they purport to be for D&D or not, have content that is useful for RPGs in general.


 * Bob World Builder - has a particularly good series about testing the realism of D&D rules which is useful for anyone making a roleplaying game and needs to estimate movement or food or such like.

D&D and Settings Specific
''These are channels that generally cover the mechanics of D&D. They are included here partially because sometime it is good to ask 'how does D&D handle this' but mainly because I was also building a list of channels for D&D and it seemed like here would be a good place.''


 * Zee Bashew - talks about the mechanics of D&D, especially famous for a long running series called the Animated Spellbook.