Supports 4K and 8K playback, hardware-accelerated decoding, and precise subtitle synchronization.

Finding a reliable, is essential since the operating system's built-in "Movies & TV" app sometimes struggles with the complex Matroska (MKV) container. MKV files are popular because they can hold unlimited video, audio, and subtitle tracks in one file, but they require specific codecs for smooth playback. 1. VLC Media Player (The Gold Standard)

It's completely free, secure (no spyware/ads), and can play almost any file format you throw at it.

Get it from the Official VideoLAN Website or the Microsoft Store . 2. PotPlayer (Best for Customization)