You can open the file by right-clicking it in Windows File Explorer and selecting "Open with," then choosing a media player like VLC Media Player .
If you only need the audio, you can use online conversion tools to turn the MP4 into an MP3. Ajb06725 mp4
If the file fails to play, it may be due to missing codecs or corruption. In such cases, trying an alternative player like VLC often resolves the issue. You can open the file by right-clicking it