We thank Jenny Mestas for the following offering on Youtube. Jenny has published two videos. Having looked at them, I very much get the impression that Jenny has found some video making software and decided to use it. I have to say, she has done a reasonable job. Her skills exceed mine!
That said, young people have many, varied ways to pass the time and be silly. The question, therefore, is "why dog excrement?"
I'm not sure I have a definitive answer other than to observe that dog fouling has clearly been inveigled into youth culture.
I say "yo, homie, bring it on, dude!"