As for the "iced tea" video, well, even if the so-called officer was being unreasonably obnoxious with his apparent need to perform an extensive molecular analysis of the liquid in question, I think the other guy was being rather dumb showing him the can's label multiple times, obviously that's not what the cop wanted. How hard was it to hand him the can, let him check and embarass himself? That said I've never lived in the USA so I don't know how this is handled over there, do people routinely steal soda cans by pretending to be policemen? Or maybe it's a principle thing, I don't know.. just kind of weird how the two interacted. Feels kind of scripted and fake in fact.
Would you really drink out of that can if someone took and started sniffing around it? Here's a counter to your question: Do police officers (where you live) routinely ask to sniff your canned ice tea? Do they also do this when you're standing in front of the store where you bought it from?** Also, even if he did have alcohol in his drink, that's, in and of itself, not illegal. Obviously the officer couldn't smell it on the guy's breath. It was just a bad arrest and that's putting it nicely.
**Actually, he bought the iced tea from another store and was waiting for some friends to purchase actual alcohol from the ABC liquor store.