"I'm just assuming if it isn't a live event then there's no reason it'll be taken down?"
Things appear and disappear on YouTube all the time, for a variety of reasons.
"But not sure why this 54 Below event is just up on YouTube and the Charles Busch concert was a one-time streaming event. Both were performed and taped prior to quarantine."
There could be lots of different reasons why this is the case.
