True Anomaly vs. Mean Anomaly

This video explains what the Mean Anomaly is, how it relates to the True Anomaly, and how to use the Mean Anomaly to propagate a simple 2-body orbit.

In case the links don't work within the video: 
Basic Orbit Shapes video
Cartesian vs. Keplerian Elements video

As promised, here are the scripts which will do the conversions between True Anomaly, Mean Anomaly, and Eccentric Anomaly: