Amber

YouTube link.  

Broadcast (1996). David Attenborough turns his life long fascination with amber into a time travelling detective story that spans 150 million years. Examining and identifying the contents of this unique material, he opens a window into prehistoric tropical rainforests and unravels detailed stories about the plants and animals that lived there. The episode shows Attenborough searching for the identities of preserved creatures inside a piece of Baltic Amber that was given to him by his adoptive sister when he was twelve years old. The Amber Time Machine is part of the Attenborough in Paradise and Other Personal Voyages a collection of seven documentaries.

I started viewing this and wound up watching the entire 49 minutes.  It's very well done.