Kharl should consider the up to date Blue-ray and the older DVD-Video formats. Pretty well any media playing software can play back the Mpeg2 compressed contained in the sidecar VOB files specified in the DVD-Video file and folder structure and the H264/AVC files used on a blu-ray disc.
The navigation and extras required like chapters alternate audio options require the use of other files just like the original Foxsat-HDR. If anything the Foxsat was ahead of it's time.
https://www.ketos.eu/fs/e1b9977d-4b13-11e5-ad75-85850ba828cf-homenet-general-info-eng-dvd-video.pdf
https://en.wikipedia.org/wiki/Blu-ray#Directory_and_file_structure
There is a lot more involved in just replaying a compressed video file than just replaying the content.
A more advanced player will allow complete playback of the content with all the original menus and options intact. A common format for these image files is a .iso file.
Windows 10 has built in capability to mount such files (including Blu-ray without any optical drive connected to a PC).
https://www.howtogeek.com/howto/windows-vista/mount-an-iso-image-in-windows-vista/
