nostr:npub1s6aj8hj2eldfgq7j662yc0plk5s97swmsnvwdf9cu77x25hesntq9lnjre There are some on this youtube channel from one of the members of Social Audio Description  Collective. They don't seem to have been doing many new trailers lately though, hopefully because they've been getting more paid work.

https://www.youtube.com/@KittenEarbreak

In terms of trailers for newer stuff with audio description, I don't really know. Sometimes the Marvel youtube channel has an audio described trailer here and there for one of the MCU movies.