: Right-click the file → Properties → Details (Windows) to see if there is a contributing artist or original title.
: It is a video someone sent you or that you saved from a channel/group. 1_5021547738098041451mp4
: Large files forwarded multiple times often retain these server-side numerical titles. How to Identify the Content : Right-click the file → Properties → Details
: You likely found this in your Telegram Desktop or Telegram Video folder. 1_5021547738098041451mp4
Files with these long numeric names often appear in these scenarios: