Video is a bad way to convey information on a website, especially one targeting disabled folks.
This is one of the better usecases for video. I can't parse a video quickly, and an interview is a rather lengthy way to receive information if the only value is spoken text. Not the case here. The number one piece of information people want when hitting the site is how it works. They went with bootstrap and the embedded video isn't responsive but no one really gives a shit because as long as it can be clicked you can get a product demo.
A video is a good idea for this product, but there should be sufficient text to tell you what it is and what it does without needing to play the video anyway, eg if you're in public without earphones or have severely limited bandwidth,
Based on the language in the video, the video isn't targeting disabled folks.