Biden brags about getting the Ukrainian prosecutor fired who was investigating his son

This is a very low quality video, as it distorts Biden's voice to make him sound whiny.  But the important part is his confession, starting at 2:25 and ending at 2:56.  I'm sure there is a better video, this is just the first one I found.

So they said they had—they were walking out to a press conference. I said, nah, I’m not going to—or, we’re not going to give you the billion dollars. They said, you have no authority. You’re not the president. The president said—I said, call him. (Laughter.) I said, I’m telling you, you’re not getting the billion dollars. I said, you’re not getting the billion. I’m going to be leaving here in, I think it was about six hours. I looked at them and said: I’m leaving in six hours. If the prosecutor is not fired, you’re not getting the money. Well, son of a b-tch. (Laughter.) He got fired. And they put in place someone who was solid at the time."

Date: 1/23/18.  Location: Council on Foreign Relations.  The city isn't mentioned, but apparently it is at their headquarters in New York.

Here is a transcript from the CFR website of the full panel session from 1/23/18 that includes the portion above.  The other participants were Richard Haass, the President of the CFR,  and Michael Carpenter, former Deputy Secretary of Defense.