: Right-click the file, select Properties , and go to the Details tab. This may show the date created, resolution, and sometimes the program or device that made it. Mac : Right-click the file and select Get Info .
Numerical filenames like this are often temporary. If this was a downloaded file, checking your browser history or download manager may provide the original website link. MediaInfo - MediaArea 3742579755728.mp4
You can find out where the file came from and its technical specs using these methods: : : Right-click the file, select Properties , and