its a best of , and it doesn't show on purpose the points that the younger guy won. But obviously he had a difficult time at receiving. in the last part of the video, he explains how he was tricked by the serve as the old guy could serve with the same initial swing either a YG serve or a pendulum serve. He's got a lot of variation as well underspin/topspin, with different speed as well.
As you can see any weak return is immediately punished. The old guy serve + 3rd ball attack is deadly. Which is crucial because probably the longer the rally the more he will struggle.