Thank God I'm not the only one!
My coming 2 yr old has done this ever since he was a baby and still does it. I tried popping him in the mouth for grabbing the halter and then he decided he would not take the bit/bridle either. Sigh. So I had to back track and put fruit roll ups on the bit so he would start taking it again and put hot sauce on the halter to discourage him grabbing it.
I did work with a trainer eventually and his solution was to get quicker putting the halter on.
So now I don't worry so much about it and just try to get the halter on quick but I don't punish him for grabbing it (unless it's just smearing the nose band and lead rope with hot sauce which I do occasionally but not usually unless he is very bad about it). At this point I am so happy that he doesn't also carry the lead rope in his mouth all the time like he used to. It used to be that I couldn't lead or tie him without him chewing on the lead rope.
I found the video very amusing. It's much funnier when it's not YOU that is having the problem!