Been having this trouble as well for my wife's LG G Vista 2. Tried to contact the developer in sever different ways now: through email, through Facebook, through the forum...no reply. The LG is running Android 6.0.1. Fairly new phone, released in Oct. 2015. I can't imagine why the mobile Play Store app says it is "not available in your country", while the web site version of the Play Store says "not compatible with any of your devices". My Samsung Galaxy S5 is also running Android 6.0.1 and it is able to install from the Play Store. I was able to take the APK from my Samsung Galaxy S5 and install it on my wife's LG G Vista 2 and the BS Player FREE works without any problem.
So, here's the BS Player FREE APK version 1.28.191 if anyone want to try to see if it will work on their "non-compatible" "not available in your country" devices:
https://goo.gl/ojMDTR