2.2.2 applies to information that "starts automatically". It's unclear to me whether the following cases count a "automatic":
- When the user moves focus to a certain button, a video starts to play.
- When the user hovers their mouse over a certain region of the screen, a video starts to play.
If WCAG included a definition of "automatic", maybe it should include the idea of the intention of the user, or what the web page advertised to the user. eg. if a typical user would not expect a video their change of keyboard focus to cause a video to start playing, then that was automatic.