I don't think Blu-Ray video format is the best way to keep these reconstructions, anyway. You could just burn these mkv files as files to a blu-ray. Many blu-ray players would support that, and of course all computers with a blu-ray drive, instead of needing proprietary software to play in the first place. I personally was very determined in storing these preservations in a way that will last, so I burned these mkv files on an M-Disc blu-ray, together with eleven different checksums, separate subtitle files and some other related files. I think .mkv files will be readable long after blu-ray video has stopped being the standard. Right now playing a blu-ray video on a computer is already difficult and often requires proprietary software. Also it'll probably be a lot easier to convert mkv files to some future standard years from now, than ripping a blu-ray video. The only disadvantage to this method is that you have to be certain that the blu-ray player you wish to play it on supports mkv files.