[envy2]

Sorry to hear. As someone who works for a non-Google Big Tech company, you will get nowhere on this trying to work with Google (or any other Big Tech) support.

If you believe your mom (and anyone using her account) definitely did not violate the T&Cs, the only thing that might realistically get a response is either [1] a personal contact who trusts you at Google escalating internally for re-review; or [2] reaching out to your state AG / consumer protection office.

That said, there's usually a very high bar for fully disabling accounts like this — either repeated violations or very severe violations (like child sexual abuse or terrorism). Might be good to figure out what the granddaughter has been up to...

[seanmcdirmid]

The granddaughter could be under 13 or something like that. Kids under 13 aren’t allowed to make YouTube videos, I’m not sure what happens if they catch an account being used by someone under that age.