However, the search results indicate that MP4 files, especially those from unfamiliar sources or security cameras (NVRs), can be associated with technical issues or security risks:
files from unknown sources to avoid potential malware. Download VC77 mp4
It is possible "VC77" refers to a specific proprietary camera model or a niche software, and the file is a recording from that device. Recommendations: However, the search results indicate that MP4 files,
did you get this file from (e.g., a specific app, website, or security camera)? What is the exact file name or extension? Are you getting a specific error when you try to open it? That MP4 file you downloaded might just be another malware a specific app