AVI isn’t a file format, it’s a container, like a wrapper around your candy bar of audio and video streams.
Your file is xvid + mp3, a bit newer than divx + mp3, could shrink a DVD quality movie to a CD, and can be wrapped in mp4 or mkv.
A friend of mine is testing my C2 so I can’t test myself but you can try these:
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cheating: rename your AVI to mp4 or mkv
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rewrapping (use the phone):
ffmpeg -i input.avi -vcodec copy -acodec copy output.mp4
(or output.mkv)
If neither of these work, you should still get a meaningful error message, and you need the xvid decoder or use an app that has built-in codecs (VLC for Android) or remux your video streams to h.264 (you don’t want to do this).
Edit: get static (all features built-in) ffmpeg from
https://johnvansickle.com/ffmpeg/