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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def draw_video(self, underlay, overlay, out, x, y):
 """ Draws one video over another @param underlay : video file on bottom @param overlay : video file to render on top @param out : output file @param start : starting position of overlay @param end : end position of overlay @param x : x position of overlay @param y : y position of overlay @param w : width of overlay @param h : height of overlay """

        cfilter = r"[0:1][1:1]amerge=inputs=2[aout];overlay=x={0}:y={1}"\
            .format(x, y)

        # Manually set the color space because other wise you'll have
        # some trippy looking overlays (-pix_fmt yuv422p)
        command = ['ffmpeg', '-i', underlay, '-i', overlay,
                   '-c:v', 'huffyuv',
                   '-y',
                   '-pix_fmt', 'yuv422p',
                   '-filter_complex', cfilter, '-map', '[aout]', out]

        if self.verbose:
            print 'Drawing video {0} on top of {1}'.format(underlay, overlay)
            print command

        call(command)