stucarney

@IBAction func handleTapToFocus(sender: UITapGestureRecognizer) {
    if let device = captureDevice {
        let focusPoint = sender.locationInView(previewView)
        let focusScaledPointX = focusPoint.x / previewView.frame.size.width
        let focusScaledPointY = focusPoint.y / previewView.frame.size.height
        if device.isFocusModeSupported(.AutoFocus) && device.focusPointOfInterestSupported {
            do {
                try device.lockForConfiguration()
            } catch {
                print("ERROR: Could not lock camera device for configuration")

iredun

Each YouTube video has 4 generated images. They are predictably formatted as follows:
http://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg
http://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg
http://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpg
http://img.youtube.com/vi/<insert-youtube-video-id-here>/3.jpg
The first one in the list is a full size image and others are thumbnail images. The default thumbnail image (ie. one of 1.jpg, 2.jpg, 3.jpg) is:

http://img.youtube.com/vi/<insert-youtube-video-id-here>/default.jpg
For the high quality version of the thumbnail use a url similar to this: