The National Center for Accessible Media is an excellent place to start. They’re the folks that developed things like closed captioning (CC) and descriptive video services (DVS) and they offer a wealth of information, tools, and how-tos for making media accessible. They also evaluate technologies for accessibility.
These are just a couple of places to start if you’re interested in coming up-to-speed on accessible media. If you create content, or technologies to serve it, I encourage you to become familiar with the issues and solutions currently available.
After all, people with disabilities should have the same chance that I did to witness Walter White go from Mr. Chips to Scarface. On a mobile device. On the train. On their way to work.
Let’s make technology an even greater thing.