Recently something happened (Maybe windows update) that has caused virtually all videos to be upside down and backwards. What I mean by that is the videos play behind me and upside down even if I reset the view. It appears that Top/Bottom VR videos actually have the eyes switched as well. Even with reverse vertical and switch eyes they are still behind me, but can be viewed if I physically turn around.
I have LAV Filters and HEVC codec installed and have tried reinstalling them with a clean reboot in between uninstall, install, and afterwards. I've tried playing with the settings in LAV Filters to see if it would make any differences, but I've seen nothing. I saw one post saying it could be some kind of color range conversion problem, but I've tested it on low res 8bit, high res 8bit, and high res 10bit videos and they all seem to behave the same.
I also tried doing a clean reinstall of DeoVR from SteamVR. I've tried both the pub version and the beta version of SteamVR. Not sure what else I can try. If I use another video player (Skybox, Gizmo) the videos work fine.
Doesn't seem to be headset related either unless it is all Vives. Tried both on a Vive and a Vive Pro.