You've missed out quite a lot.
The ADA was passed in 1990, so it was in place a full 17 years before Berkeley started adding video to the web.
The university strongly agreed with disability accessibility law. They put policies in place to make sure content was accessible. They offered free support to professors to make content accessible, and they required professors to sign documents saying "I have made this accessible". People lied by signing these forms when they had not made the material accessible.
If they hadn't lied, and had made use of the free support when creating content, the material would have been accessible from the beginning, and the university would not have been dumped into the massively unlawful position they were.
This wasn't some "opportunistic ADA lawyer", it was the inevitable result when hundreds of employees lied about accessibility.
Pages 3 and 4 https://news.berkeley.edu/wp-content/uploads/2016/09/2016-08...
Here's the list of statements that people said they'd done that they mostly had not done:
1.I have reviewed and implemented edX’s “ Guidelines for Creating Accessible Content.”
2.All PDFs attached to my course follow the University of California Office of the President recommendations.
3.I have reviewed and implemented applicable guidelines into my course from the Web Accessibility team’s resource “Top 10 Tips for Making your Website Accessible.”
4.All mp3 and mp4 files in my course have been submitted for transcripts for SubRip Text (SRT) files.
5.All video and audio in my course have accurate captioning available to users through the edX HTML5 player