At 0:13 on your video, the crowd is clearly saying "fuck Joe Biden". So this video is explicitly political, given that its name is a dogwhistle for "fuck Joe Biden".
"Dogwhistling" doesn't mean "saying something that means something else", it means using coded or indirect language to communicate something to a specific group of people while hoping that the general audience doesn't pick up on your meaning. Everybody knows what "let's go Brandon" is code for, and the people who say it aren't trying to hide what they really mean.