Sample blackmagic design video recorder swift only

I need a sample project designed based on these apis. [login to view URL], [login to view URL] We need a very simple app that has a button that shows the video from connected camera through blackmagic device to show it in an image view. A button that stops the video in that view. And a button that records the video to disk. We are new to external apis and would just like to see a good sample of how it works. We need as much in swift as possible.