Two questions:
How do I pick videos with PHPicker stored in iCloud?
How do I track iCloud download completion progress?
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
	let type = "com.apple.quicktime-movie"
	results.first!.itemProvider.loadFileRepresentation(forTypeIdentifier: type) { url, error in
		let newURL = ...	// copy item at url to a new location	
		let asset = AVAsset(url: newURL)
		
		// display the video
}
Is this the correct approach? Items do seem to be downloaded from iCloud but I don't know how to track download progress.
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