From the comments to the video which I happen to think is accurate:

Why would she be worried about what this guy got to say. He is only repeating lies about the Clinton’s that has been going around the right wing for years. It not going to change anyone minds but it will get a bunch of conservative to go out a spend their money on the same book just with a different cover.

That is, it’s an old story, untrue, and even if it were true is anyway irrelevant. How will it change anyone’s mind about her fitness for President? First there needs to be people on her side who are willing to believe any of this matters, and on her side there is hardly a one.