When ever you produce materials, consider how it will affect all your potential target audience. How will someone who is deaf benefit from your video? How will a person who is blind fill out your forms? Addressing these issues before a person with a disability comes through your door will allow you to be ready to serve that client. Also, considering the formats for your information adds to the communicative power of your message.
The National Center for the Dissemination of Disability Research produced an excellent website on creating user-friendly materials and alternate formats including: