Kalanick's opinions and behaviour are obviously of interest to the public right now. There are quite a few anecdotes that, taken together, paint the picture of a thoroughly chauvinistic CEO with a bit of social darwinism thrown in for good measure.
His comments here further that impression: he throws around jingoism in his awkward attempt to impress his companions ("every year is hard for Uber...") and is either uninformed or dishonest with regards to the driver's complaints.
The "footage of him with two women" could not be cut out because it is the entirety of this video. It's necessary both to prove the identity as well as adding context and body language.
The women aren't identifiable and him being out & about with two women could have been observed by anybody, and was probably observed by the people at whatever Super Bowl event he was visiting.
It's also hard to judge this without remembering that Uber employees had, for years, full access to any customer's ride data, and often used it for fun & stalking. They boasted about their ability to algorithmically tag "rides of glory", set out to punish a journalist by digging up private information about her, and collect data about user's positions not directly required for their actual service.
I fail to see how this is character assassination. It's a primary source – the video itself carries the meaning, and if that is damaging to his reputation, then the flaws are his and not something made up by any journalists. Likewise, I ain't reducing anyone's "bayesian priors" because the driver's credibility is completely irrelevant. He's not making any relevant statements of fact beyond those visible in the video.