Media organization, video upscaling, and screencasting are just a few of the additional features third-party media players (for Windows 10/11) can bring to the table. These built-in video players for Windows 10/11 only support a limited range of formats, meaning that half of the time you can’t even open the files you need.
Since most computers come installed with a video player, why would anyone hassle with downloading a third-party software? Simple.