If you were hired as remote you have a pretty strong case for constructive dismissal.
I think you’re going to have an uphill battle if you were hired to work in a building and they allowed work from home due to a pandemic. I don’t think being slow getting back to the office is going to win you your case.
Easy. YouTube doesn’t want to deal with actual DMCA more than they have to, so they have their own system that lets big companies do whatever they want, whether the content is legal or not.