If you are posting this for an audience, please note that . The custom codec method works best on the MX Player Pro version or older builds. If you are writing a guide, you might want to mention that users sometimes need to download the codec zip file from trusted third-party developer threads (often found on XDA Developers) rather than the Play Store.
MX Player requires a codec that matches your phone’s processor. MX Player Custom Codec 2.7.x custom codec for mx player