There's no American condiment that's as beloved as ketchup. This thick, gloopy sauce is a staple at summer barbecues, where it's smothered on top of fresh-from-the-grill burgers or hot dogs.

Following is a transcript of the video. Narrator: Ketchup, it's everywhere in the US. 97% of Americans have a bottle in their fridge. It's the sauce we put on our hamburgers, our hot dogs ...