If you received this file from an unknown sender or a suspicious group, do not open it. Scan it with an antivirus program first. How Malicious MP4 Files Threaten Security and Reputation
Look at the folder where the file is saved. Folders named "Telegram Video" or "WhatsApp Video" confirm the app it came from. 1_5170666846541578998.mp4
Use VLC Media Player if the standard player fails, as it supports almost all MP4 encoding types. If you received this file from an unknown