MKV for android is the best open source video player,fast and easy and full of features!

MKV for android plays most local video files as well as network streams.
It support auto- rotation,aspect ratio adjustment,gestures to control volumn , brightness and seeking.
double taps used to control seeking.


permissions:

MKV Player for android needs access to those categories:

it needs permission in order to read Internal storage all media files.
It needs permission in order to allow you to change brightness.