Gary Lam is a student of the late Grandmaster Wong Shun Leung. I my eyes, he has far exceeded his teacher. That's how it's supposed to be. It means (a) Gary Lam was a good student, and (b) Wong Shun Leung was a great teacher to produce a student such as Sifu Lam.
Anyway, in this video, you will hear Sifu Lam talk about the "Fung Hao". I don't have this on good authority from an actual Wing Tsun source, but my wife, who knows a few words in Chinese, tells me fung hao means "good wind". I suppose the idea is that you can't stop the wind. Whatever you do, it still blows in your face. Maybe you can hide from it, but you can't stop it.
One of the most intriguing things about Sifu Lam is how far he can push people with no apparent effort or any discernible body action. Also, look at his center. It is rock-solid. While his hands flow, his body is always erect, his head up, his gaze relaxed and straight ahead, and his entire body moves as "one piece." I consider him one of the very best Wing Tsun/Wing Chun masters out there.
When you train, even when learning new and unfamiliar techniques, always keep in mind the mottoes: "Push the head to the sky, feet firmly on the ground", and "head up, with horizontal vision."