However, at any time you can deviate from the script and gain control of the "camera" - which means that you can zoom in, zoom out, go left or right, and basically move through the presentation at your own discretion. For instance, if you missed lecture a couple of weeks ago, you can go back and see the content reviewed in lecture. Everything is organized thematically, so follow the subject headings (rather than look for dates or assume the content is organized following any kind of linear logic) to find the relevant materials.
Here are the links to this semester's prezi's so far. I'll also embed them in the course blog on a regular basis.
Weeks 1-3: Research Methods: What, How and Why: http://prezi.com/clwbqfryt8zl/inf1240-research-methods-lectures-1-3/
Week 4: Interviews and Focus Groups (+ SSHRC workshop): http://prezi.com/dj-uabcjqemc/inf1240-research-methods-looking-at-specific-methods/
Week 5: Surveys and Experiments: http://prezi.com/4moul6grrias/inf1240-research-methods-surveys-experiments/
Week 6: Ethnography and Observation: http://prezi.com/kfz6h8fjcqve/fall-2011-inf1240-research-methods-ethnography/
If you're confused about how this works, please don't hesitate to ask for help!