Totem

Totem is the official movie player of the GNOME desktop environment based on xine-lib or GStreamer. It features a playlist, a full-screen mode, seek and volume controls, as well as keyboard navigation.

It comes with added functionality such as:

• Video thumbnailer for the file manager
• Nautilus properties tab
• Mozilla (Firefox) plugin to view movies inside your browser (in development)
• Webcam utility (in development)

For deb-based distributions (like Debian, Ubuntu, ...) this is:

$ sudo apt-get install totem-gstreamer

For yum-based distributions (like Fedora Core, ...) this is:

$ sudo yum install totem

For portage-based distributions (like gentoo linux, ...) this is:

$ sudo emerge totem

http://www.gnome.org/projects/totem/