Most smartphones are optimized for MP4 . Playing a complex MKV file often requires "software decoding," which uses the CPU more heavily and can drain the battery faster than MP4's hardware-accelerated playback.
The easiest fix is the industry standard: . It is free, open-source, and plays almost everything. mkv pc and smartphone
Think of an MKV file as a box. Inside that box, you can put: Most smartphones are optimized for MP4
Don't let the .mkv extension intimidate you. It is the best format for preserving high-quality video and audio. As long as you have the right tools—specifically for PC and Android, or Infuse for iOS—you can enjoy your media library without compatibility headaches. Plex is the ultimate solution.
If you have a large library of MKV movies, Plex is the ultimate solution.