More than likely, the material released to the public is not the material used for enrolled students. At the same time, they most likely have funding to make ma

More than likely, the material released to the public is not the material used for enrolled students. At the same time, they most likely have funding to make material accessible to enrolled students on an as-needed basis. If a person with a particular disability is enrolled at the University, the University will work with the student to discover their requirements and how they can best meet their needs. At that point, they can go through the list of courses the student has enrolled in for each quarter or semester and ensure that all of the course materials are accessible to that student. Once they've completed that process, it usually has the side benefit of making those specific materials accessible to all future students with similar needs. The whole process is also getting better over time, especially for textbooks and similar material. However, video and audio are especially problematic areas when they are produced by individuals who don't understand (or aren't aware of) these requirements. If you just setup a camera and/or microphone to capture a lecture, public release and captioning may not be on your mind at the time.