This specific numeric string is typical for files distributed through Telegram channels or chats.
If you have this file on your device and are unable to open it, you can use these methods: 5_6321168377595298097.mp4
Use VLC Media Player, which is highly compatible with various codecs and platforms including Windows, Mac, and Linux. This specific numeric string is typical for files
Do you have about the video's content, such as a specific Telegram channel name or a description of what happens in the clip? MP4 files explained: How to open and use - Adobe 5_6321168377595298097.mp4