Well I don't think you need every set..base and good ..I would want the streamer ffmpeg..heres Debian's description of it in synaptic..
FFmpeg plugin for Streamer
This Streamer plugin supports a large number of audio and video compression
formats through the use of the FFmpeg library. The plugin contains Streamer
elements for decoding 90+ formats (AVI, MPEG, OGG, Matroska, ASF, ...),
demuxing 30+ formats and colorspace conversion.
others like gstreamer lame and gstreamer fluendo..
But i think if you want to use totem gtsreamer to play back media like quicktime,wmv,real ..your going to need the gstreamer pitfdll to make use of the w32codecs.
In my distro,Debian lenny, it has pitfdll 0.10...I don't think it would be hard to find a RPM of it...you might have to download other rpms to meet dependencies for it..for example..in Synaptic..properties for pitfdll it lists these dependencies for it on my distro..
and recommended w32codecs
As far as what plugins are in each set..this should answer it..