If you're having trouble opening the file, ensure you have a versatile player like VLC Media Player installed, which supports most MP4 codecs [3, 11]. Just tell me what happens in the video!
"Tell me you're [Topic] without telling me you're [Topic]... I'll start."
Suggesting tools like Handbrake to convert variable frame rate (VFR) clips to constant frame rate (CFR) [13, 19].