I left a playlist on while working, so an anonymous account. A full on hour self-help seminar was playing as an ad.
if you don't skip the ads you get to some weird places.
Its weird too because the ad-player doesn't like you scrub the timeline or go forward-back. So even if it was an interesting ad you can't go back or interact at all. Its so similar to a late-night infomercial and unlike a YT video its uncanny.