почему в США толстые люди одна из причин
"why the fat people in the United States is one of the reasons"
This is one reason people are fat in the United States.
I don't suggest watching this video for this Russian guy's dietary advice on sugary soft drinks. But the video reminds me a bit of the Krashen natural method of language learning with "comprehensible input". This guy is pointing out and describing the use of a Coca-Cola vending machine. Perhaps you'll learn a a new use for the verb "выходить" the verb "to come out". Here is the conjugation of the Russian verb выходить.