I love that channel. Especially turning (I believe) nitrile gloves into hot sauce. Some of the chemistry he performs, I would never think of even existing. It's like people that say margarine is one molecule away from plastic, without understanding that all of chemistry works like that.
Naturally occuring polymers like https://en.wikipedia.org/wiki/Fatty_acid are indeed very similar to synthetic ones, in that they both contain long hydrocarbon chains of varying length.