Mirror of this video for metric homies - https://streamable.com/upza7t

He may or may not have lied. The lady could have been grateful at first and changed her mind in hindsight (e.g. after learning it was just a stunt).

Asserting that he's lying without knowing that he's lying is a mild form of libel. In the scale of moral wrongs, calling someone "a despicable human being" and a liar is arguably worse than giving a woman flowers for views.