HDZero recommends osd recordings be saved as .ts files. Unfortunately not many video editing programs seem to support .ts, and converting files one at a time is laborious. Microsoft clipchamp processes the .ts files, but it is adding hiccups and skipped frames to the videos, so I want to try some other program.

Any recommendations for intuitive / simple video processing programs that can hopefully handle .ts files? All I want to do is cut, combine, add music, not lose too much video quality.

Thanks!

You can easily convert them with lossless cut. Also basic editing on keyframes is possible. It takes only seconds to convert them into a mp4 container.
https://github.com/mifi/lossless-cut

Thanks, also got a recommendation for capcut. I will take a look at both of those.