Eh, I thought I could bypass the screen capture restrictions by streaming using a sideloader app, but either something changed, or I did something wrong, but I only got black screen as soon as my testing application started, so no screenshots or video is coming.
For now I’ll shelve further testing. I want to explore some ways of streaming non-VR games to the headset in the future so I’ll post an update then, but it will take quite some time, effort and possibly a relatively expensive thrid party app, so it will have to wait for now.