There's two characters missing from the middle of the name.

Not sure how HN's symbol stripper handles them, but here's a try:

    qiao乔于yu

probably not their actual name. if you need a search term, qiao乔于yu is better than qiao yu. better read chinese. they've long deleted the actual video, of course

Or the whole thing is an "inverse" PR, completely manufacturing the information spread, to get people interested in Tang dynasty. Conspiracy vs. conspiracy.