At my local cinema they usually play around 5 to 10 minutes of ads before a movie. But I still remember one particular movie where it just didn't stop and they blasted jewelry ads left and right for a whole 22 minutes. It was "Wish" from Disney.

That whole ordeal made the movie even worse. I do like seeing trailers, because I get excited for new movies, but fucking jewelry ads? Those are the lowest of the low. I'm sure they would've played gambling ads next, if that was allowed in Germany.