The Inclusive Sport Design website has some good resources, namely videos, blog posts and other useful material. Newly added to the resource list are four short videos explaining inclusive sport.
Inclusive sport program planning and framework briefly explains the key elements to planning an effective and sustainable inclusive sport program.
Adapt and modify with TREE. A framework for adapting and modifying sport activities for a range of capabilities.
What is the inclusion spectrum? This is a framework for describing all the way people with disability can participate in sport. There is a link to more information on the YouTube page.
What is universal design? Repeats the 1990s definition and principles from the North Carolina State University. Unfortunately it doesn’t relate specifically to inclusive sport. Rather, it is yet another video with the old definition and principles.
Note that Inclusive Sport Design is a for-profit organisation. However, they offer free advice via the website.