Check the to see where it came from. This helps you determine if it’s a precious memory or junk:
It is the "Swiss Army Knife" of video players and can play almost any format, including raw camera files. g078.mp4
Generic filenames are common for dashcams. If a dashcam loses power during an accident, the file (g078.mp4) might be "unfinalized" and unplayable. Check the to see where it came from