I can completely relate to your comment about being filmed, Janet! I think with practice we become more comfortable in front to the camera, but of course we do have to consider if serves a purpose.
With your video it appears you're mostly interested in viewers getting the gist of your project, so using screen shots does make sense. Good approach and high 5 for getting a prototype together so quickly! It looks like a lot of work went into making it and we'd love to hear more about your process.
I have a couple comments that are more related to the use of features, plus a question:
I did a pause and rewind a couple times -- did a couple slides appear more than once?
I found myself wanting to read what was in front of me, but found that difficult with the slide moving and length of time it was displayed.
The overlay text helped fill in the context, but it would be better to use darker lettering for that. The first run through I didn't notice some of that text. Also, my eyes were drawn to the smaller print rather than the overlay -- so it would be useful to make it more obvious that the viewer is not meant to be reading the smaller print, if that makes sense!
What do you think about using voice over to help to explain the project?