No, Waymo is not driving remotely. Remote operators can only answer simple questions. They're at the point of commercialization so it's all about unit economics. There's no point in driving remotely especially since it does not scale cost-wise.

Waymo is geofenced, but within its geofence it requires zero human intervention. Tesla on the other hand is famous for mistaking the moon for a traffic light. Saying "Tesla has so many miles on YouTube" is hilarious because first of all there are channels with lots of Cruise & Waymo footage too, and more importantly it's not the # of miles that matters, but the # of non-trivial scenarios you can handle.