The title is inflammatory. This article is based entirely on how he feels from a 30 second commercial and his experience with ITT Tech. It has nothing to do with his Udacity experience.
Unlike ITT Tech or any other for-profit universities, you can do a majority of the Udacity curriculum for free. e.g For the VR Nanodegree (shown in the video), you can signup for the courses for free [1] and evaluate it whether the format/quality works for you. And like any other content provider, some courses might not be good as others.
I am currently doing Udacity's Machine Learning Nanodegree [2] and also did the first AI class from Sebastian Thrun and Peter Norvig. Part of the Nanodegree involves doing courses from Georgia Tech's Masters in Computer Science curriculum.
[1] https://www.udacity.com/course/vr-software-development--ud10... [2] https://www.udacity.com/uconnect/intensive