I didn't even think to check that method (sending password reset instructions) until you posted. Good call.
In my findings, the main e-mail address Glass uses with his current YouTube channel is unregistered. However, we know he has numerous Discord alts, ergo numerous alternate e-mails. If anyone may be aware of his alternate e-mail addresses, I would implore you to check them via this method and report back the results.
Honestly, it would be the smartest thing he's done so far, which comes as a surprise given his track record.