Download the matching ZIP codec pack from trusted developer forums like XDA Developers.
Versions around or earlier typically work best for Android 4.4+. Installation Requires manual Sideloading (installing via APK file). Performance mx player apk android 4.4.2
Once you have downloaded the correct APK file, you need to install it. Since you are not using the Google Play Store, your device will likely block the installation for security reasons. Here is how to bypass this safely: Download the matching ZIP codec pack from trusted
If you are using an older device, you need a media player that is efficient and compatible with older hardware architecture (often ARMv7). mx player apk android 4.4.2