You can upload files to tools like VirusTotal or OnlineMD5 to check if the file matches known records or contains malware. Why you might see this string
: It may be a unique key for a video stored on a private server, a Content Delivery Network (CDN), or a security camera system. 7ffc1f6b82b11a6c115c29c8bc1276f9mp4
: Systems use these hashes to ensure they aren't storing the same large video file twice. You can upload files to tools like VirusTotal