Dead on! They had that video planned as a killing blow for a week before the election but had to rush it out because Hillary was in freefall due to being a stumbling mess. Most candidates would have withered even then but Trump said “uh uh!” and kept going. And he overcame it, because it came out early and he had time.
The Billy Bush in the video is a Jeb/George cousin, George H. W. Bush’s nephew. They could have released the video early in the primaries. They chose to keep it for use in the general, probably because they knew it would hurt Jeb’s image and reduce his chances of being the White Knight to save the GOP from Trump. But they had to release it as revenge against Trump for knocking Jeb out of the race.
The Bushes are sore losers, and I will not vote for anyone from that clan for the rest of my life.