: You cannot play this file directly. You need a tool like 7-Zip (Windows) or The Unarchiver (Mac).
: Files starting with 2_ followed by a long string of digits are almost always internal filenames from Telegram's database. 2_5381890950157044301.mp4.7z
: The .mp4.7z means it is a video file ( .mp4 ) that has been compressed or "zipped" using the 7-Zip format to reduce its size for easier sharing or storage. How to Open It : You cannot play this file directly
: Once extracted, you can use any standard media player like VLC Media Player to watch it. 2_5381890950157044301.mp4.7z