Where it is said you should simply use $ sudo apt-get install totem-gstreamer which will install the latest stable(if you didn't change your apt_preferences) release.
If you explicitly want the latest release, no matter if stable or not you could add -t unstable to the apt-get command. Please see the man page for more info.
You can download it on the launchpad page of totem
Or alternatively on the launchpad page for totem in Ubuntu
Edit:
Sorry i thought there where PPA's somewhere on those sites.
There is also a Totem page on gnome.org
Where it is said you should simply use
$ sudo apt-get install totem-gstreamerwhich will install the latest stable(if you didn't change yourapt_preferences) release.If you explicitly want the latest release, no matter if stable or not you could add
-t unstableto theapt-getcommand. Please see the man page for more info.Ricotz PPA also has it https://launchpad.net/~ricotz/+archive/testing/+packages