Since you mentioned using VLC, I attempted merging several files together according to VLC’s documentation, but that didn’t work for me. I was able to merge several files into a single video file using FFmpeg, but I had to change the audio encoding in order to make that work.
I don’t know what platform you’re using (I’m guessing Windows or macOS since you initially mentioned using Adobe products), so I don’t know what other software would be options for you, but using FFmpeg on Linux seemed to work for me after a few hiccups.
Thanks for this description, @K6CCC. I hadn’t ever tried pulling video directly off the card before, but that made sense of the file organization for me and made it easy to grab a few files to use for testing.