So I just fixed it, I downloaded an app on the play store called apk-signer, I signed the apk file, then it installed without a problem and it plays just fine! Thank you for your quick response though.
Glad to hear you got it working. First time I've heard about this solution, interesting.
You are a Saint among men... Seriously though, I had same issue of stopping 80% through and this worked for me as well.
You are a God send! Thank you soooo much for sharing this out here. Fixed the problem!
