I notice that the YouTube field of the BBS profile only accepts alphanumeric characters, and whatever is entered becomes a link of the form www.youtube.com/<alphanumericfield>. I'm mostly ignorant of how this part of YouTube works, but my understanding is that not everyone can reserve a youtube.com/<alphanumericfield> URL. You need a certain number of followers, have qualifying channel art, etc. Everyone gets a www.youtube.com/channel/<randomlyassignedalphanumeric> channel URL, but I can't enter that into my BBS profile and get a working link.

There's some history with G+ URLs that I've forgotten the details of. It looks like anyone can reserve a www.youtube.com/c/<alphanumericfield> URL. At least I have one, not sure how. But I can't enter that in either.

I think the YouTube profile field needs to accept more values and/or provide hints in the profile form on how to link a profile to a channel.

Actually, everyone can get an url like youtube.com/@username.
But, yeah, it still needs some work on it.

I for the longest time couldn't put in my youtube channel id cause I needed to put in channel/id and / isn't allowed,
And now that @handles exist it still doesn't let me type in @.
It's not the biggest deal but I'd like to be able to

@dddaaannn, you listed this under Pico-8 bugs ?

It's a BBS bug that I filed in 2018. At the time, not everyone could have a custom channel URL, and the field wouldn't accept anything else to produce a working channel link.

I believe Ahai64 is correct and custom channel URLs are now generally available without channel performance requirements. The PICO-8 profile field accepts all of the characters after the "@" and produces a working URL in the form: https://www.youtube.com/XXXX So there's probably no longer an issue.