Chosen Solution
I haven’t been able to find the Video Player that plays movies from Gallery, or EXPLORER system app, or my default apps, I have looked in all apps.
I am assuming you have Android on the tablet. For playing movies, download from google Play Store a program called “VLC”. For file management, download a program called “ES File Explorer”.
You can download some video viewing applications to try. If possible, download rokkr and try to see a movie application that you should try.
