Thanks for reaching out. You'll need to have at least one of your account related information (i.e email/username and any recovery options, if set up) to recover you account. Once you have that, here's how you can regain access: https://yt.be/help/2MGr . Hope this helps.
While we can't verify identities manually, to regain access, you'll need to have at least one of the account related info (i.e email/username & any recovery options). Hope this helps clarify.