The good news is you can watch any of your 3D 180 VR videos on Vision Pro in amazing quality, here is how:

Download Moon player app on IOS (free at the moment - 11th February 2024)
Put your VR videos into a folder on Icloud Drive, optionally download from Icloud to local Vision Pro storage if you want
Go to files app, under locations find Icloud drive, sync it if its not synced yet
Open Moon player, select import from files, and select from Icloud drive your VR Videos - set them to 180 in the player.
Alternatively you can use Reality Player (9 USD) as well instead of Moon Player