Can only tell you that after fresh flash and install of Matemanas rpm on Nexus5 i also have the same issue with video playback and many larger apps. The one thing that is working perfectly is navigation with Google Maps and Here We Go though. Enogh for my needs to have a Sailfish device with decent navigation \o/ To solve the remaining issue, do we need to root AD to look into logs? If not, where to acquire meaningfull android logs?