The words in the video were "these guys are worried about your presence. They are just worried you might steal something." That does not sound like they heard anything. And if the kids were messing around (as I remember doing too often myself), they could have asked them to quiet down or leave for disturbing other customers, but these words.... what could have happened to justify these words. I am all for seeing 10 minutes before, but I ask you, what could have happened 10 minutes before that would justify those words? I guess you could argue poor choice of words, but I don't think that would stand up. I worked retail before I kicked out plenty of people for many things, but not once did I say "we just worried that you might steal something so that is why you need to leave."