News report featuring how to do a 4x100 Handoff. Good intro to the concepts

Good video explaining (beginning) exchange zones (Middle) blind exchange concepts (end) you can skip the end. 

Just really like the initial coverage of this 4x100 relay for America. The rest slows it in slow-mo but is hard to see details. 

A little bit dated but completely solid information and a good watch from start to finish.