I just stumbled upon this – the classic series by Eyewitness Videos is now available on YouTube for free! When I started teaching in the 90’s, we didn’t have all the amazing free online videos available at our fingertips like today and relied on…..gasp… VHS tapes. Having a collection of quality science videos in your classroom was highly coveted!
https://www.youtube.com/channel/UCEBTfxJ13zkpZVbZTF3aukg/videos
About EWV: “Eyewitness is a natural history television series produced by BBC and DK Vision. The series is based on the Dorling Kindersley Eyewitness Books series of children’s books.”
Here are a few of my favorites:
Middle School Science Blog 