The portion in profile for YouTube channel seems to be broken.
I tried putting my channel link in there and it tells me incorrect characters.
Upon investigation I realized it wants to use www.y outube.com/user/channel address.
YouTube stopped using the user portions sometime ago. Granted if your account was a legacy account you could still use that functionality but newer accounts now use the www.y outube.com/channel/channel address style link.
I had to put spaces between the y and o so it wouldn't create a link just an FYI.
If we could get this fixed to be able to include all possible youtube links for channels that would be exceptionally nice.
Here is a link from youtube support that explains what channel link they use especially if you have a custom URL.
https://support.google.com/youtube/answer/6180214?hl=en