Don't be intimidated by the list of apps you are directed to in this section. No-one expects you to be able, or want to become expert at using all of them. Try things out to see what works for you. There are many more out there for you to use, these are just a few to start you off.
Blab (video streaming)
Prezi tutorial (lecture presentation tool)
Microsoft Expression – Derek Robertson demonstrates screen capture
Microsoft Expression – Derek Robertson demonstrates converting to MP4 format
Screencast-o-matic (video presentation)