Interesting idea. It reminds me of a project that was presented by someone in a research lab in Paris which was an full blown version of your idea. That projec

Interesting idea. It reminds me of a project that was presented by someone in a research lab in Paris which was an full blown version of your idea. That project took screenshots every few units of time (or a full movie kind recording). Then it did some optimization in storing it (since the is very little chance of a lot of difference between consecutive images). Then it did image to text on those images and made it searchable. Interesting idea and if you can make it searchable, it will be amazing.