Elliptic orbits explained by Albert Baez (1959) [video]

Per the comments, and verified by a casual Wikipedia search, the speaker, Albert Baez is the father of Joan Baez, the well known American singer/songwriter.

https://en.wikipedia.org/wiki/Joan_Baez#Early_life

and John Baez the well known American mathematician https://en.m.wikipedia.org/wiki/John_C._Baez

This is great!

An example of an earth satellite with highly elliptical orbits is Molniya orbits mentioned here https://earthobservatory.nasa.gov/Features/OrbitsCatalog

Fabulous.