I don't think you will see this as trained in Wing Chun. What you see is Sticky Hands and how it looks when it's Wing Chun vs Wing Chun. When you use it against another someone who doesn't train Wing Chun then it will look different. Most people fight with one hand forward and one hand back. This means that you will be too far away to maintain sticky hands, which is probably why some Wing Chun schools are really big on always moving forward. This mindset may be so that you can close the distance. If you get close enough then you will cram your opponent's punches or encourage him to try to grab you. This is probably where Wing Chun sticky hands would be most effective.
We had one user apply sticky hands in ground fighting and based on the video that I saw this is when it looked like Wing Chun sticky hands. The only difference is that he was on the top mount punching down as the other person was trying to defend and deal with in the incoming punches.
1:33 - 1:39 is how I feel about Jow Ga. I think it applies to all Martial Arts systems.
The day I started to get really good at Jow Ga was the day I no longer thought Jow Ga vs Jow Ga. Jow Ga vs Everyone else makes the techniques easier to understand. When other Martial Artist here share information about their system, I start to think Jow Ga vs that system. I'm always asking myself "What is the Jow Ga Answer?" I think this way of thinking can help anyone. So those who have trouble with Wing Chun should think. Wing Chun vs Everyone else. Then when it's Wing Chun vs Boxing, then "What is the Wing Chun Answer"
You also have to give yourself flexibility to Develop Wing Chun. This is the most important because it will allow you to do Wing Chun in a way that fits the situation but it may go against what you were taught. This how development works. If you don't give yourself that flexibility then Wing Chun will never be yours. It will always be someone else's Wing Chun
You are thinking as an American, in the land of free, free to create and free challenge. In China where kung fu all started, you are discouraged to think, to change and to object. I was raised in Hong Kong, I know how it worked, worst is in China. In Kung Fu, they put a lot of emphasis in EXACT hand and feet placement, you have to do it in the exact way.
Wing Chun was started by a woman, you can see all the punches and strikes started in the middle of the chest. Emphasize in elbows close together to protect the breast ( for good reason). You can put a ring around the two elbows and they can fight like that. Same as the stand, they start with the leg separation from the first form( the "little idea"), then close the knees and sit to lower the body. Then they just turn to the left and become the traditional stand for Wing Chun. They advance by the left foot step forward and drag the right foot. They retreat by pushing the left foot to move the body back. This is very slow compare to boxing or MMA that dance back and fore. Wing Chun can never chase fast enough if they stuck with their stand. I think they have the stand like this to protect the genital......understandable for woman. they have a name for it in Chinese, I don't know how to translate it.
We in the East are taught to copy, glorifying copy, not original. Creativity is NOT encouraged. I was a musician when I was in Hong Kong( had a little name in 1972) by winning 4 Talent Quest in two years. We copy the song to the exact, even the guitar solo followed the exactly the original song, that's what they called good. It's only after I came here in 73 then I opened my eyes and change. I have recordings of before and after I came here. The ones from here was so much better!!! It's a different philosophy, you have to live there to understand. I am so blessed to be able to come here and open my eyes.
Look at Xu Ziaodong, China HATE him for making their traditional kung fu look so bad. They even force him to paint his face before he can go into a match to humiliate him. There is a standing offer of $20K for anyone who can beat him. He reminds me of Bruce Lee back in the days, those "masters" hated him because BL called them out like Xu Ziaodong. I was surprised China finally acknowledge Bruce Lee and have a stature of him somewhere.
funny in your video, I understand exactly what he said, he must be in Hong Kong, speaking the same language I speak before( I speak English at home now). He is so bitter, saying Xu Ziaodong just whaling punches, can take a punch on the head and still nothing bother him!! MMA is so fast you have no time to think, look at how fast he chased down the Tai Chi master. The thing that I look at the most is the foot work in UFC fights, a lot is on the foot work. I am not an expert, I started stick fight 3 months ago, I started with footwork and add the stick into it, not the other way around. Same as I practice punching and kicking, all from the footwork and add onto it. Too bad I am too old and slow down. People in UFC have amazing speed on footwork.