MX Player does not natively support the format, which is often used for adaptive streaming or archived high-definition footage. To play these files, you must custom codec pack that includes specialized decoders like those found in the MX Player Custom Codec 2.7.x Step 1: Identify Your Device Architecture
Codec-Agnostic: It isn't a codec itself but a delivery protocol that can carry various codecs like H.264, H.265, or VP9. vm dash format codec for mx player
In MX Player, go to Settings → Decoder → Custom codec and select the downloaded file. MX Player does not natively support the format,
Version Specifics: Use version 1.90.1 for the most recent MX Player builds or 1.87.0 as a stable alternative. How to Install the Codec or VP9 . In MX Player