plugin for figma playbackSettings property

I’m building a plugin for figma in js + typescript. In a desktop application, when I output SceneNode, there is a playbackSettings property there. There is no such property in the documentation and typescript swears that there is no such property. What is it for?

This property is designed to work with video. For example, you can control autoplay, looping, and mute.

There is no bug in the Plugin API here. But perhaps the Figma team will notice your post and add this property to the documentation and typing file.