My feedback for this idea has been overwhelmingly positive, so the core of my elevator pitch has not changed much. I've tried to change this one up a bit to make it less of an advertisement to a customer, and more of a pitch to an investor though the added statistics in the beginning. I've started looking at competitors, like OnStar in the napkin exercises, but this video is not really the place to address that.
One suggestion that I saw was connecting the app to online stores for car parts. That might be something to add later on, but I think that falls outside of the core functionality of the product. This is meant to be a starting point, from which someone can either work on their car, or take it to a mechanic. I think going from that starting point straight to "here's some stuff to buy" may open you up to some liability if those parts don't turn out to be what's needed.