Hello Netleyned!!!
What can I say, The place where the video was taken is within a small park, people use to go because there are a lot of restaurants, ice cream parlors around it, on weekends is a family place, people is seated around because the benches are not enough. People who really are interested in the boats are mainly children and they are behind those who are sailing. Mexico City have 20 million citizen, but hobbies as building boats, airplanes, trains, cars, etc. have almost disappeared, The hobbie with more fans is RC airplanes, then cars and last the boats, for flying airplanes you have to go out of the city, so the hobbie takes you all day. Other thing is that we only have a couple of public places inside the city where you can enjoy the RC boats, no place for glow engines. Yesterday there were only two more boats. The park have two blocks, in the other block there is a fountain like you saw in the video, there the people (mainly children) can rent some Acuacraft Tugs (a good business), but that is almost all you can see in the hole city.
Best regards