It's a pain in the butt! there's no google-provided way to do it and the extensions that were written to do it are all terrible or non-functional. Luckily, youtube runs on "computers" and "computers" can be "hackarino'd" with just a bit of encouragement. Prereqs are a) ability to follow instructions b) maybe some familiarity with bash. I'm writing this from my mac, it'll be the sameish on linux and WSL.
This is for non-"brand" accounts, cause i'm not a brand. I'm a small business man, not a small business, man. I'm not a man either but whatever.
This at least is easy.
- open youtube.com > profile icon > your data in youtube, should take you to myaccount.