For anyone wondering about seeing videos in passthrough, I’ve found a patchy way to view them for the time being.
Here is what I Was able to figure out
Download video, if the video has an alpha Channel or black background even better. Otherwise you might need to run it through any software you can find that removes background. There are plenty of ai tools out there where this is pretty much automated.
in my case I used the old slr desktop app in conjunction with ALVR to run SteamVR so all pass through videos automatically show the black background without any post work required. For now and probably the easiest method is to do removal yourself and use moon player on the Vision Pro
once you start to play the video use the gaze drop-down that pulls up the small menu for apps, environments, control center and notifications. I recommend you look opposite the direction the main focus will be in the video so the menu isn’t on top of what you’re looking at. What will happen is any black background will go transparent and you’ll start to see your surroundings. From the small test I tried out, any color in the scene will come through and it will look like a normal passthrough video.
there are a few caveats to this
you loose the ability to stop, start, or jump around the video while the drop down is active
transparency is applied to the entire video, it’s surprisingly not that noticeable but could see if you’re in a bright environment this becomes an issue
if the background is black, it does dim your surroundings, this did actually add a nice blend into the pass through but might not be wanted in all scenarios
the ALVR method I used does require a bit of setup, you need the TestFlight build for the Vision Pro and use the nightly version of ALVR for desktop along with steam installed. I just so happened to have the old SLR app on my desktop and saw that this no longer has support / updates. There may be a better path here but this is what I had and used along with some tests using moon player on the Vision Pro.
This is all very patchy until we start seeing an actual app or breakthroughs on the WebXR side coming from the SexLikeReal team but does at least give us a pretty good glimpse into what we could see with pass through.