If you want to clean up the name and ensure your system recognizes it properly, follow these steps: Open File Explorer and go to the View tab.

If you have OBS installed, you can use the Remux Recordings tool to quickly change the container format from MKV to MP4 without losing quality. Summary Table Recommended Tool/Action Play immediately VLC Media Player or MPV Fix name Rename file (ensure "File name extensions" is on) Change format Use HandBrake or CloudConvert

The is always the one at the very end. In this case, your computer sees it as an MP4 file . However, if it was originally an MKV and someone just typed ".mp4" at the end, it might not play correctly in standard players. 2. How to Play the File

Use VLC Media Player . It is free, open-source, and can play both MKV and MP4 files regardless of whether the extension is named correctly.