I understand King Solomons concerns and personally share the opinion that we should respect the deaf. Although I might add the following, very interesting, added value for deaf communities:
1. People are not mocking the deaf per se or the language. It is a silly combination and a rather unlucky combination of things that make this funny for many viewers. A religion trying to put rules on normal, human activities - the combination "deaf masturbation and sect" just made it exotic, niche-like and sparked worldwide interest. If you notice most people are NOT mocking deaf persons. They are dumbfonded by the stupidity of an organization that uses resources to enforce something that is MORE than a stupid rule.
Maybe you are not aware, but young people have committed suicide over the shame, guilt and constant bad conscience about things like these!
2. Good, positive side effect: you will notice this only if you read around the different forums. This is creating POSITIVE effects for the deaf and sign language communities. Many, many people asking: WOW, does he have to do these gestures. Many others answering how Sign Language works, deaf persons chiming in (without being all "arms up, this is outrageous") and explaining how their language works and how using emotions is necessary. Heck I've read comments about people wanting to learn the language now! I think most mature, grown up humans are not mocking people with disabilities and this is creating a positive, free PR campaign. Believe me, Sign Language is getting good, well deserved attention. Many of the commenters didn't knew that a deaf person can't read regular written words.
There is no harm here - people laugh all the time about others that have a funny accent. Hell, American Idol participants became famous and made good money out of their unique, funny way of singing. I've seen a famous chinese guy getting millions of hits on Youtube because of his funny english pronunciation.
Now, the second brother could disfellowship himself and show up at Oprah, CBS or whatever Show he could get in. He could make a ton of cash. Some people in one of the forums are saying that they would pay money to see him as a comedian, that they never saw someone be so perfectly expressive. Sad enough, we all know that he is using his skills for the wrong organization.
In another forum some guy wants to collect donations for a deaf charity.
This is the good stuff that I am seeing. There will always be people that are idiots, but this will be with or without this video.