It's been quite some time since I built the theme, but as I recall FauxVert DOES play video. That being said you're right in that the video's need prepped. I had a script I ran via a video editor and did all mine in bulk, it wasn't a manual process at all. I didn't ultimately use that theme and just use portrait mode on my vert cab. I don't have any Steam games that don't play in TATE mode on that cab and so haven't really ran into too many issues. Most emulated titles that aren't vertical just use a bezel I found online to fill the dead space in the screen.