Most built-in players (like QuickTime or Windows Media Player) may struggle with MKV. The easiest fix is to download the VLC Media Player , which plays almost any MKV file out of the box.
If you've downloaded this specific file and are having trouble playing or editing it, here are the standard solutions: AgADQAYAAlaE8VY.mkv
Professional tools like Adobe Premiere Pro or After Effects sometimes require plugins like Influx to import MKV files directly. Most built-in players (like QuickTime or Windows Media