The general consensus in that thread is that, while the Vision Pro can play “flat” porn videos on sites like PornHub, there is currently not an easy way to play 180 degree side-by-side videos on the Vision Pro, which is how most commercial VR porn is filmed.
Sounds like this might must be a video format issue, and there are a LOT of apps in the App Store that play videos that are not natively supported by the OS. I don’t see why Apple wouldn’t continue to approve apps that support other formats and codecs.
VLC not on Vision Pro yet?
Not yet