Specifically, concerning this video.

I hope you realise that this video is basically stating "Gays shouldn't get married because it'll mean people will have to tolerate them" ... you could basically use the argument they used for proposition 8 for restricting the rights of --ANY-- minority.

"Black people shouldn't be free because that would mean people would have to tolerate free black people"
"You shouldn't be allowed free speech because you'd have to tolerate people talking"

It's the same argument that people have used throughout history to suppress minorities, making the claim that we have a civil right not to tolerating people based on a factor of their lives that they (in most cases) can't control. It was used in america to suppress black people, it was used in britain to suppress women, it was even used during the time of the crusades to suppress muslims in europe.

"We can't let the muslims get the same treatment as us! We have a civil right to burn and torture them!"

Sound a little extreme? Not for those days. With the rate at which bigotry is dying out in the world, people in a hundred or so years, we will look on the "we have a right not to tolerate gay couples" argument like we today look on the "we have a right not to tolerate muslims/woman voters/black people/etc." from hundreds of years ago.

And on a side note - the quote from the bible often used to justify bigotry to gay people, correctly translated, says "You shall not lie with a man in the bed of a woman, it is frowned upon". Note that nowhere does it say (or even imply) that it's a sin, only that it's frowned upon, and it's specifically referring to "in the bed of a woman" meaning you shouldn't sleep with a man if you're currently married to a woman - a simple extension of the "you shall not commit adultery" commandment.

I'm not a christian, but I read the bible when I was. (It was, in fact, reading that bible that put me off christianity)