Here is a bit more  what gelatin is actually made from on wikipedia:

Gelatin or gelatine (from Latin: gelatus meaning “stiff”, “frozen”) is a translucent, colorless, brittle (when dry), flavorless food derived from collagen obtained from various animal by-products. It is commonly used as a gelling agent in food, pharmaceuticals, photography, and cosmetic manufacturing. Substances containing gelatin or functioning in a similar way are called gelatinous. Gelatin is an irreversibly hydrolyzed form of collagen. It is found in most gummy candy as well as other products such as marshmallows, gelatin desserts, and some ice creams, dips and yogurts. Household gelatin comes in the form of sheets, granules, or powder. Instant types can be added to the food as they are; others need to be soaked in water beforehand.

We hope you like the video and don’t recommend trying this with your iPhone.  And in some of the other iPhone experiments we posted do not try without the supervision of a professional/