What would be an average file size if recording 1 minute of video on the iPhone 6? Normal speed, no slow motion.
My iPhone6 22 minute video is 3.1GB. 3100/22 = 140MB per minute. This is 1920 x 1080 (1080p) @ 30 fps.
I checked the Frames Per Second in Settings>Photos & Camera>Record Video in my iPhone6 menu. I saw it was 1920x1080 pixels per frame when I imported the video to my Macbook using a program called Image Capture.