Accessibility:

Your Current website has:

• Closed Captioning (for videos that have that ability)
• A disclaimer at the footer- (a statement from you that you are putting importance on this)
• An App that allows people to alter font size etc. esp. for dyslexia.

The 3 above will show good faith attention to accessibility and should prevent attacks.

The wording from the ADA regarding accessibility act section 501 is to provide "reasonable accommodation". You are not 100% covered from liability as this is a bit nebulous from a compliance perspective.

There is a company that specializes in accessibility and plugs into the website to make accessibility even better for blind, deaf and other impairments.  This will not make you 100% free of attack, you are just able to "service" more disability and may add more peace of mind. Xpress Inc will provide you with the option to Sign up with UserWay or anytime, just submit your request.