You can use the third-party video player application to play 4K videos. VLC Media Player is the most popular third-party video player for Windows 11. Or, else you can add 4K codecs support on your Windows 11 pc, using a video extension to play 4K videos on the default Windows video player.
Change the Display Settings
The first way to fix the blurry screen issue on Windows 11 is to change the display settings. You can do this by right-clicking on your desktop and selecting Display Settings from the menu. Next, select the Advanced Display Settings option and change the resolution to the recommended value.
To change resolutions on Windows 11, right-click the desktop, select “Display settings,” and choose the resolution. Or open Settings > Display and change screen resolution with the “Display resolution” setting.
DivX Player is considered the best Windows 11 video player. This software allows playing advanced codecs like HECV, MKV, and AVI. You can play media up to 4K resolution. DivX Player is free software that allows you to stream on DLNA (Digital Living Network Alliance).
If you're using an outdated display driver on your computer, Windows 10/11 may have issues detecting the display over HDMI. So, you need to update the Display driver to fix the Windows 10/11 not detecting HDMI TV or 4K TV issue.
Make sure to update your graphics driver to fix video playback stuttering on Windows 11. To automatically update your drivers, use the Device Manager or manually download them from the website of the GPU manufacturer. Access the Device Manager by right-clicking on the Start Menu.