This document is a placeholder for the spec for "Virtual Accessibility Nodes", a part of the AOM project. For background, please refer to the Accessibility Object Model Explainer for the background and motivation.
Virtual Accessibility Nodes will allow authors to expose "virtual" accessibility nodes, which are not associated directly with any particular DOM node, to assistive technology.
This mechanism is often present in native accessibility APIs, in order to allow authors more granular control over the accessibility of custom-drawn APIs.
On the web, this would allow:
<video>element, or another novel form of UI presentation.