Video settings, codec, etc

I have some questions about Video settings as I really know very little about this subject.

As I have been helping a friend to make some animations, made with Blender, for educational presentations I think I have found my new addiction. 😆

For stock videos the quality has to be 100% so I have been searching the web to see what the best formats are.
I am thinking of rendering PNG stills, HDTV 1080p at 30 fps. HDTV 1080p seems to be the standard. Then the standard format with Blender seems to Quicktime and Codec H.264. No idea what to do with bitrate and GOPsize 🙄

A lot about Blender video output can be found here:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Output/Video

I haven’t looked at the Symbiostock site possibilities yet but I suppose I should use the ZIP format on my site for video’s.
If any video crack could give me some tips I would be grateful.