Alcohol + pools never mix. You know they all just peed in that pool. Sure it's fine when one, maybe two people pee in a pool. But after a certain amount, you're almost guaranteed to be swimming in someones golden elixir.
She holds the up the cup in the belief that she had saved her drink from the pool. I know someone who dropped an entire bottle of wine into a hot tub filled with people stewing in it, and still drank the whole thing herself.
I watched this guy's other videos and have come to the conclusion that no one in this video is older than 20--with the exception of the older gentleman who is speaking off camera. He is probably very cool because he hangs out with underage kids and lets them drink.