Speaking of not being able to read; The DOJ did not say the videos were illegal. The DOJ ordered UC Berkeley to make them compliant with ADA standards.
The university decided to remove the media because it was not worth the trouble and cost of fighting a lawsuit over compliance, and the cost of compliance was too high.
There was - is - absolutely nothing wrong with the videos themselves. The word "illegal" does not apply to any part of this situation. Big fuckin' difference.