Just view for videos.
Without any unsafe functionality and extremally simple. You can’t delete/edit/share files in this app. And no any annoying ads.
Even toddlers can use it safely.
Choose first video file
Swipe to play next/prev file
If current file finished next file will be played automatically
Developed and tested for
Lenovo TAB 2 A10-70F
Enable USB debug
adb devices -l adb -s 0123456789ABCDEF install JustView-v1.0.0.apk
from Android device
Enable unsigned apps installation
Settings -> Application -> Unknown sources (Allow installation of non-Market applications)
then copy APK to device and install