This service allows you to type a body of text up to 3000 characters and will rewrite it and search stock video sited it has partnered with and assign video for what it thinks would be appropriate for that section of the presentation.  I don't know how accurate the chosen videos are in this particular example, but you can customize it with your own videos or images, I just didn't do that for this one.  I was testing it out.   They made my message kind of disappear though.  which I can edit.  but the message to understand was that isn't it beautiful that we are alive right now in the long history of humans on the Earth.  our time is NOW.  Which is both frightening and motivating.