You realize that many alleged rape and harassment cases evolve around consent and that women not giving 100% clear signals (according to some men) is a huge topic regarding that.
This video is made for very young people to educate them, that they need to make sign as clear as possible, so nobody missunderstands your signal.
If you accuse someone of rape and you can proof you waved your hands and said "stop it, dont touch me", instead of being ashamed or feel like its your obligation to comply or you are to prude.
It may look funny and I dont say it doenst look hilarious, but matter of fact, if someone would do what they show, its a clear sign an in a court casenobody can argue about not giving signs.
And again, its not supposed to say that you should start a little dance. The dance and "lyrics" are just because young children learn easier that way, the video is not aimed at adults.
And as usual: What exactly would you do to prevent rapes and especially educate young people?
Lets not forget that every 14 year old knows what sex is, but many of them havenever spoken abour rape with anyone.
Besides probably having it seen in porn already.