Record and save video through ARKits AVCapturesession

I am trying to record a video from my camera while an ARView is running and I was wondering how I could do this, as documentation on doing this with an arview is sparse to none. I only need the actual camera feed, not the content that my arview is presenting on top. I know I can get a CVPixelBuffer for each frame of the ARView, but I don't quite understand how to package this up into a video and save it in documents.

I have this code to manage updates from my ARView in my SwiftUI View:

arView.scene.subscribe(to: SceneEvents.Update.self) { _ in
                    if recording {
                      //do stuff if record button is pushed

                    }
                }.store(in: &subs)

What do I need to do to package up all the CVPixelBuffers as a video once the stop recording button is pushed? Totally new in this field so any help is greatly appreciated!