It doesn't 'look' out of order to me. It does sound 'out of order'! It sounds to me like the 'extras' have been added- the sound doesn't seem right and the background sound appears to change when the alerts are going off. I think it is probably fake- with 'enhanced sound effects', posted here for outrage!
You will not convince me that those sound effects happened then! The advent of the digital imaging age meant you could no longer believe any photograph. The 'youtube' age means you can't trust any video now! Don't swallow everything you see blindly!