Since the filename itself doesn't describe the video, you can:
: You likely found this in your Telegram Desktop or Telegram Video folder. 1_5021547738098041451mp4
: The string of numbers is a unique ID generated by Telegram's servers to track media within their database. Common Contexts Since the filename itself doesn't describe the video,
Files with these long numeric names often appear in these scenarios: How to Identify the Content : Search your
: Large files forwarded multiple times often retain these server-side numerical titles. How to Identify the Content
: Search your "Saved Messages" or recent chats for "5021547738098041451" to find the original message.
While I cannot access the specific video file stored on your device or within a private Telegram chat, here is the context for that file type: File Breakdown : Telegram messenger (Desktop or Mobile). Format : MP4 (standard video file).