No audio or video in Tutorials

Hi - I am brand new to all of this, so this may be a dumb question, but... Just starting to us the tutorials in the trial sessions. Except for the Overview, I can't seem to find a tutorial that has audio and video, just text and graphics. Is that correct, or am I missing a link or something somewhere? If so, please advise, because that Overview was so good, I was looking forward to the others being made like it!

Thanks,

Courtney