How does CallKit work with video calls? I know there's a supportsVideo flag in the CXProviderConfiguration class, but I can't find any information about what it does.
My app only does video calls. I want to take advantage of CallKit to have incoming call alerts show up full screen, but once the user accepts the call, I need the UI for the video to come from my app, not the system UI. I don't want the user to have to press another button to get into my app. Is this possible?