: Right-click the file and select "Extract" or "Unzip." This will reveal the actual .mp4 video file.
: You cannot play this file directly. You need a tool like 7-Zip (Windows) or The Unarchiver (Mac). 2_5381890950157044301.mp4.7z
: Files starting with 2_ followed by a long string of digits are almost always internal filenames from Telegram's database. : Right-click the file and select "Extract" or "Unzip