Yum Hi Yum, there are downloadable trailer videos on adult sites such as https://www.czechvr.com/
They are 60 fps videos in 5400 x 2700 resolution using the H.265 codec, and they won't play smoothly on the Oculus Quest. Usually they play back at around 30 fps.
I've found that the highest resolution the Oculus Quest will play smoothly in Skybox (and Oculus Gallery) is a 60 fps video in 4864 x 2432 resolution, using the H.264 codec. The resolution has to be lowered further for an H.265 codec video to play smoothly.