Seeing that the guy records it on camera - her girlfriend tries even harder. In addition, she wants to look even prettier - she fixes her hair, makes eyes, smiles. Knowing that the guy will show this video to his friends, she wants to impress them as best she can. Female logic!
Well, not really that and normally filmed, almost nothing interesting can be seen, and the lighting is poor. And the lady is really cool, I would like to see her pulled in normal quality!