Some people with multiple learning disabilities will have problems interpreting video/animation that is moving too quickly. It is therefore an advantage to be able to adjust the speed of video/animation in a data program. For people with great concentration problems (e.g. people with cognitive difficulties) it is important that a program response in the form of video/animation lasts long enough for them to understand what is happening on the screen.
Choices should be saved (see 5.3 Settings should be saved).