Right-click the file, select Properties , and go to the Details tab to see the date created, frame width, and length. On Mac: Right-click the file and select Get Info .
The naming convention, particularly the addition of (1) , often occurs when you download the same file multiple times to your device, with your computer or phone automatically numbering the copies. 770054949544_3(1).mp4
Long numerical strings are frequently used by surveillance systems or dashcams to timestamp or serialize video clips. Right-click the file, select Properties , and go
If you have this file and want to know what it is without opening it blindly, you can check its metadata: Right-click the file