Someone posted this great comment on the video:
If you don’t believe in Evolution then don’t use vaccines or antibiotics (including penicillin), don’t have transplants or any product achieved through Genetics & Germ Theory – that includes modern animal & agrarian produce (e.g. beef & wheat), which is selectively bred, & relies on genetically researched inoculations & pesticides.
The Theory of Evolution is used with Germ Theory, Genetic Theory & Biochemistry to produce all of these things & many more.
PS. Enjoy your leeches.