The TED video is a feature of Sam who has Progeria, a genetic disorder that causes children to take on appearances of old age. This would be a great video to show biology students during your unit on genetics. Also, it would be great just to show a class how somebody with health issues can still be successful and happy.
This TEDEd video discusses five parasites and how they affect the host's brain. The parasites it discusses are the Gordian Worm, Rabies Virus, Ophio-Cordyceps, Plasmodium, and Toxoplasma. Each one of the parasites has a unique way of getting the host to help it reproduce.