Use the native photo gallery/video app on your iOS or Android device. 3. How to Convert or Edit (If Needed) If the file is not playing properly or you need to edit it:

Use media players like VLC Media Player (plays anything), QuickTime (Mac), or Windows Media Player.

Here is a complete overview of what this file likely represents, how to handle it, and how to create/manage such files: 1. What is a "Twitter (10) mp4" file?

Mentioning a downloader bot in a reply to a tweet. 5. Troubleshooting

The download may be corrupted. Re-download the video.