Hello Skybox team,
in previous versions (around 1 year ago?) it was possible to open VR-mp4 files by using Windows's Right Click > "Open with" > Choose Another App function and selecting SteamVR_SourceVRPlayer.exe (instead of browsing to the file in the Skybox VR itself). Not sure if this was intentionally removed, but this is not working anymore. Alternatively, supporting drag and drop of files to play onto that exe file would also be great.