In general, you should first try to find packages that were specifically made for your distribution.
Do not compile from source yourself unless you are certain you have to or want to. Do not compile from git master unless you really need some specific feature that is not released yet, or want to help out developing Flumotion.
Cortado is no longer maintained by Flumotion. You can find the latest versions of Cortado in Xiph's web site.
Old versions of the Cortado applet are still available in our Cortado jar download area. The cortado-ovt applets contain Ogg, Theora and Vorbis. The cortado-mmjs applet contains MultiPart with JPEG, Mulaw and Smoke.