(( For the uninitiated:

1, It would not be unrealistic from her to assume youtube's copyright algorithms to flag her video into oblivion. It's known to happen.

More importantly, 2, Vi work for Khan Academy, who is sponsoring her "to do whatever she wants". That comes with lawyers. ))

Jesus, does she really think her video's going to get taken down if she plays thirty seconds of a Schoenberg piece?

I suspect not. She's getting in a few pointed jokes at the idiocy of copyright maximalism.