Currently there is an option for "auto-play" and there is another field for "Autoplay Speed" but the editor can fill both together. Thinking about the consistence and UX I think we can apply a form states logic to allow the users fill the "Autoplay Speed" onky when the option of "Autoplay" is enabled
Implement the #FormAPI with form states for apply "autoplay speed" only when the autoplay is on. If autoplay is off disable the field "autoplay speed"
Fixed
1.4
Code