Play a Video
From the Home screen, tap the Apps icon
(in the QuickTap bar) > the Apps tab (if necessary) > Gallery 
to view videos stored
in your phone’s internal memory, microSD card (external memory), or
albums connected to your Google Account (e.g., Picasa).Scroll left or right to view more albums.
Tap an album to open it and view its contents. (The pictures and videos in the album are displayed in chronological order.)
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, tap the timeline to jump to that part of the video. While playing a video, press the Volume Keys
(on the back of
the phone) to adjust the volume.While playing a video, tap the timeline to preview that part of the video, then tap the preview to jump to it.
While playing a video, press the Volume Keys
(on the back of
the phone) to adjust the volume.
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.