No, for the reason cited in the video.
Then after they both sue you how much frustration will come from dealing with all that hassle? You wouldn't be able to ignore or they'd win by default. Enjoy trying to get your own personal legal fees back out of those two even if and after their suits were dismissed. You'll never get back the time.
I don't know who landed the first blow, but both of them passed up plenty of opportunities to let it go. Screw them both.
And btw, you'd be fighting the kid too, have fun with that part of the lawsuit.
I'm sympathetic to your sentiment, but too rational to get involved in the disaster that is those people's lives.