Hi Boro Park Girl.
I know what you mean.
At the same time you are watching them some of them are funny.
My thought is that while slapstick is funny, when that “funny” ingredient passes into real “slapstick” physicality, where a person is truly falling or banging into something, it is sort of not right to watch and be entertained.
That is just my opinion. Its a gray line because sometimes the people in those clips are laughing too when they get up.
Here is a true story about something I did:
I went bowling once and purposely went past the line where you should have already rolled the ball, and went onto the lane. Well, I have never experienced anything so slippery in my life. My legs flew up and I was parallel to the floor and then came down sliding, still, to the side of the lane. Basically, I was a gutter ball.
I laughed and tried to play it off at the same time I was embarrassed and holding my elbow. I walked back to sit down to a sea of people, even several lanes down, laughing and asking if I was ok.
Why was that universally funny to people who did not know each other?
Maybe it has to do with the Freudian idea of Thanatos, and that once a person is ok, it is funny. Of course, if someone, chas veshalom was perceived to be really hurt, people would not laugh, I would hope.