Censorship in surgery footage?

I was watching a surgery take place on one of those educational channels and everytime the clock on the wall was shown in the background, it was censored out with a black shape? Why was there a need for this if any? They can show a person’s face being opend up and screws and pins being put in it but no deal on the hands of a clock?
-M

Maybe it was for continuity?

Sorry, just realised this is GQ. Please pardon my speculation.

Could it have just been for Copyright reasons? Like if the clock had a big “LAWSUITCO CLOCK COMPANY” logo in the middle?