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Not that this is important, but I was just updating my user profile here and tapped in my YouTube channel, it says it doesn't exist. I don't care about it, but thought it's something maybe the board admins might want to check into.
I have the same issue and had tried it short after I joint.
It was a bit shocking to see as I fear that this is just another sign on the way on which g00gle is eliminating the old yt-channels.
I wonder how LoR backchecks the validity of a channel but I still get the user-api-data with yt-name or channel-ID allright.