What he is holding there Phil is a law suit in the making.
My take away from the video.
It is a defective firearm that as I see when loading by racking a round in the action the gun fires that round.
The gun should not fire that round by closing the action. That is all he is doing. The Safety has nothing to do with it.

Had he not practiced Firearm safety (I.e. Muzzle control) someone would surely gotten hurt!

That firearm should not fire just by working the action and cycling a live round.

I'd be calling Winchester ASAP!

JW