1_5154472878510441123.mp4

mp4 . This specific filename format is common for media downloaded from messaging apps like .

: If you got this from a Telegram channel, go back to the chat and search for that specific filename to see the original caption or context. 1_5154472878510441123.mp4

: Go to File Explorer , click the View tab, and check File name extensions . Ensure the file actually ends in .mp4 . click the View tab