Some time ago I wrote how I installed ac3 codecs for MX player. MX player is my default offline video player.
Looks like I do not watch that many video offline using my handy, since only about 6 months after migration to moto g 2015 I noticed that old codeсs do not work and I need new version.As previously, I tried codecs which one can find on google play. But there I found 1.7.X only, meanwhile MX Player said that 1.8.0 was required. Googling for given version lands me to xda-developer site.
There I downloaded codes using my phone, adjust MX player settings and solve the issue.