Maybe a trick hack for the problem of "OSError: MoviePy error: failed to read the first frame of video file nCoronaVirus.mp4." exception. · Issue #1078 · Zulko/moviepy · GitHub
GitHub - alfg/quick-dive-into-mp4: 🎥 A technical intro the MP4 container byte structure.
mp4/atom/mp4_atom_trun.c at master · fredrikwidlund/mp4 · GitHub