I use DVDDecrypter or Makemkv to get the it off the disk and to the mkv video file with audio and subtitles. I then encode H.265 with handbrake which passes through the embedded subtitles.
I then used subtitle edit on the video files: https://www.nikse.dk/subtitleedit
It can convert the embedded subtitles into a srt file.
You can embed that srt file back into your mkv with mkvtoolnix without having to reencode the video: https://mkvtoolnix.download/
I’m interested to see how this plane performs compared to the Concord. It’ll be interesting to find out how bad the maintenance will be.
Also the criticism and the “whatabout other important things” people commenting here should know that more than one type of research can be performed at the same time. This is an aerodynamics problem. The other problems related pollution from engines, fuel sources, and environmental impact are also being worked in parallel. A planet of 8 billion people is able to work on many problems and ideas in parallel without having one be a detriment over another. It’s not like an aeronautical engineer can be repurposed to be a fuel chemist!