This clip becomes progressively more challenging so will require ongoing discussion with an adult, though you may not choose to watch it all! After each point made in the clip, pause to explain and discuss with your child. Use the opportunity to expand on technical vocabulary, e.g. display, insulation.
Reinforce your understanding by now watching Look Closely at Feathers – Nat Geo Kids. (Be warned, the narrator talks very fast! Hence, you may want to watch this more than once)