This recording will have little or no effect on Trump's support levels. Asking people to justify supporting Trump while brandishing this recording only entrenches their positions. I suppose it does make you feel superior to them, but I'm not sure you needed the help to begin with. I'm using the plural "you" but I am not above singling anyone out.
In my view, there are two kinds of people: the ones who like Trump, and those who don't. (That is, I hardly think anyone is sitting on the fence about him). These are two separate camps with no overlap. No new information is going to change anyone from one camp to another.
The people who don't like Trump have already maxed out their dislike for him (or else come quite close to it) and there's not much left to say about him that would push them further away. And given the mountain of reasons not to like Trump, I expect no one will be inclined to move from hating him to supporting him.
The people who do like Trump support him for a few core reasons, and assassinations of his character do little to affect those core reasons. If I think Trump is going to build a big, beautiful wall, and if this is the one thing I care about in the election, finding out that Trump is a bad person does not change my mind.
Another core constituency would be the people who are on the receiving end of élite condescension. These people weren't educated in the Ivy League schools (or possibly anywhere else) and have been told for the past few decades that they're too stupid to know what's good for them. They've been called backwards idiots, bigots, racists, sexists, whatever else, and whether or not that's true, they resent it.
And the more insults get piled up on Trump, the more they support him. Sure, Trump might himself be a member of the élites, but he hasn't really been treated like one lately. These supporters identify with Trump because they have faced the same élitist condescension.
I like to send people this article: http://www.vox.com/2016/4/21/11451378/smug-american-liberalism
It reminds us that Trump is a creature created by the so-called progressives in the USA.