Dell XCD35 Smartphone - Manual (Page 70)

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Tips: You can also set a song as ringtone when it is being
played back. Tap Menu Key > Use as ringtone.
7.4 Playing Your Videos
To play a video file, tap Home Key > > Videos. This will
open the Videos Screen and show the video files saved to
your memory card.
Tap a video file and the video player will open. Tap on
the screen and the control bar will appear as below. So
now you can play, pause, fast forward, etc.