Windows Media Player in Windows 10 doesn’t natively support the .mp4 format. To play MP4 you need to download some Codecs or use one of these 3rd-party video or media players. These two packs ...

Although Photos app is mainly intended for opening images, you can use the same app to watch MP4 files on your computer. It supports Windows 11 as well as Windows 10. However, if you use Windows ...

I was recently sent some video clips in .mp4 file format and could not open them with Windows Media Player, which displayed a message saying the file was incomplete or corrupt. I tried various ...