Boyst0250.mp4

: Many dashcams, bodycams, or security systems use prefixes (like "BOY") followed by a sequence number.

: Ensure it is actually an .mp4 and not a double-extension file like BOYST0250.mp4.exe , which could be a virus. To give you more specific advice, could you tell me: Where did you find this file? BOYST0250.mp4

If you need to know exactly what is inside the file (resolution, frame rate, bitrate), use a tool like MediaInfo . This will tell you: : (e.g., H.264, H.265/HEVC) Audio Channels : (e.g., Stereo, AAC) : Many dashcams, bodycams, or security systems use