Earlier quoted context omitted.
The worry of a lot of us is that the cheapest and easiest way to comply is to remove the content. Once gone the problem is solved. That may not be the intent, but if I were in the universities shoes that is EXACTLY what I would do. Even worse if I have to pay lawyers and transcribers.
And ongoing costs for a new ADA compliance office, and the red tape everyone in the community will have to wade through with that office to publish an officially vetted video. This will have a severe chilling effect on such productions, above and beyond the not trivial costs of getting high quality captions, which for technical material---which includes plenty of specialized humanities stuff, not just math, physics,…
I unfortunately don't have a lot of insight on the case itself, but I surmise the reason why these activist lawyers are going after Harvard and MIT is because they have plenty of resources to solve these issues. Part of being a leading academic institution is to "do the right thing", and at this juncture it's up to highly specialized legal people to figure out what that means.