Well, 15 seconds of a simple animation commercial is is fine, I mean, just tiny stuff not very important in my view, but when MyAnimeList adds this kind of stuff to the database, is good for the users, so that they can see the anime in other places, not only in movies/tv series. You have a universe of soundtracks and marchandise, and using it this was is cool. Hope they will continue this idea. Sure there is a lot of commercial based on animes, but as I don't watch them so casually, I think they are a lot of fun.