To play a video
Tap the Home Button
> the Apps icon 
> Gallery 
.Scroll up or down to view more albums.
Tap a video in an album to play it.
Tap the video while it’s playing to view the playback controls.
While playing a video, the timeline allows you to jump to a specific part of the video. Tap the timeline. The video continues to play without interruption with a preview window that plays from the selected spot forward. Tap the window to play it in full screen.
While playing a video, press the Volume Buttons
to adjust the
volume.
NOTE
The recording retains the orientation in which it was taken. If you hold the phone both vertically and horizontally to take pictures and record video, you'll need to rotate the phone to view full screen images in the Gallery app.