About 10 seconds in: "Here (Heros) are found in a branch tangle in the deeper, faster water in the creek itself." The notion that Heros are restricted to slow water is incorrect.
We need to get off certain stereotypes for fish habitat, the truth is many of the widely distributed types can be found in variable biotopes, which is why they've been successful in the hobby for many decades. Another truth is some of the fish we might keep as one or two (example: severums), or even six in a tank (examples: geos, angelfish, discus), travel in much larger groups in the wild.