referring to the MOL programs, they have to be part of a Firmware upgrade.
If using an Android application, like MX PLayer etc., you can load the most recent Codec's separately.
FYI...Codecs are the interface between the Chipset hardware, and the applications code.
XPL3900 Chipset - AML S912-B, Octa Core ARM Cortex A53 CPU, MaliT820MP3 GPU
Chipset info