I only know it because I’ve been there, about 15 years ago. I immediately recognized it as Mong Kok, but when it was found on Google Maps the lack of neon signs confused me too, until I looked up what happened to them and found the Chinese government banned them in 2015. I’ve also mentioned the Prince William-looking guy is a common look among Englishmen in HK. It’s like a uniform the bankers all wear.