Sadly the video has a slightly low bit rate or maybe 4k just doesn't look as good as I remember, but I found this on torrent site.
Best passthrough app for me has been Heresphere, hands down the best video player I used for VR (and with the price it better be). If its an alpha channel passthrough video, you can just pick alpha channel in the advanced settings and it'll work on its own, but if its one of those color ones its got color droppers to pick the colors and play with it.