To delete the channel you need to retrieve it first. By chance, did you already try going through these steps to get help signing in: https://goo.gl/v7CdWx ? Let us know if it helps!
@TeamYouTube I need to delete an old youtube channel but I forgot the password! Please help, it shows my face and I don't want it on Youtube anymore! Thanks -Josh
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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