I get what you're saying regarding the Youtube thing. I recently started interacting over at Twitter and was surprised just how many people apparently really into crypto (judging by their avatar, description and tweets) were oblivious to BitcoinTalk!
Worth noting; if this ever did take off, then it would probably be a good idea to repurpose the Twitter account @Bitcointalk for marketing. I know previously its been used for announcing any major issues with the forum i.e outages.
It's something that I recently brought up to theymos. Not for marketing anything, but IMO it should be used for more than to Just inform people of outages. Plus, it would help bring some new information about this place out there.
FWIW, I see the Bitcointalk Youtube channel just as official as the Discord server - don't like slapping official on things anyway.