The linked article doesn't give a lot of detail on the specific complaints or what you would need to do to make those sites accessible. Do you have any information on that?
"Given the Israeli accessibility law, the use of the courses on this new website will be limited (up to 500 students). According to the Israeli accessibility law, unless this requirement is met, there will be a need to add subtitles to all video clips in all of the courses that the website includes."