totem is GNOME Videos.

Videos is movie player for the GNOME desktop based on GStreamer.

Almost all the controls are documented in the keyboard shortcuts 
dialogue, accessible through Ctrl+H, or the Keyboard Shortcuts menu
item. Some others are listed below.
 - Ctrl+Q = Quit
 - Ctrl+W = Press back button/Quit
 - Mouse button 1 double-click = Toggle full screen
 - Middle mouse button click = Play/Pause