: Right-click the file → Properties → Details (Windows) to see if there is a contributing artist or original title.
: Search your "Saved Messages" or recent chats for "5021547738098041451" to find the original message. 1_5021547738098041451mp4
Since the filename itself doesn't describe the video, you can: : Right-click the file → Properties → Details
The filename "1_5021547738098041451mp4" follows the specific naming convention used by for downloaded media files. 1_5021547738098041451mp4
Files with these long numeric names often appear in these scenarios: