: Sound data synchronized with the visuals, such as MP3 or AAC.

Could you provide about where you found this video or what you expect it to be about (e.g., a specific tutorial, security footage, or a course video)? The best way to repair a corrupted mp4 video file?

: If the file doesn't open, tools like Untrunc can sometimes rebuild the content using a healthy reference video.

However, based on standard file behavior, an typically contains: