How can I gather data from a watch for an activity classifier model? Are there any tools to help facilitate this?

I am successfully transferring a .mov file and the correct delegate is being called from the watch counterpart. Yet when I try to reference the URL of the file that was transferred, the file is can’t be found. Is there a specific file path that transferred files are saved to? Is there another way I can download a .mov file from my iPhone device to a counterpart?

I am trying to add a border around a AVCaptureVideoPreviewLayer, but the left and right sides of the border get clipped after setting the corner radius to anything above 24. The top and bottom border show. I cannot figure out an explanation for this.