Tracker Analysis of Free Fall Acceleration

The latest video from Juddy Productions. In this video, I use the freeware program "Tracker" to analyse a slow-motion video of a free-falling object to determine the acceleration due to gravity at the surface of the Earth.
An excellent video for all Physics students. However, it has been designed with senior secondary school students in mind.
Please share this with those who may benefit from or enjoy it.
Many thanks.
Mark.