You can't send high volume through new accounts. Usually when a gmail account is being used for real spamming, it's an established one that's been taken over and the spammers are just discharging the accumulated reputation of the account.
My incident is unlikely to be a real account being taken over. The name format was "firstnamelastnameofficial@gmail.com" and I have a somewhat rare name ... probably well under 40 people worldwide with the exact spelling.
I emailed the YouTuber and told him I think your account is compromised.