Earlier quoted context omitted.
This a case of you seeing in the video what you want to see. Practically every advertisement ever created has happy people using a product. This is just a device meant to make life easier - stop overthinking it.
The difference is that while most advertisements show people happily using a product, this one shows people becoming happy merely from the act of purchasing. I also got a very uneasy "consumer junkie" vibe from it. Of course, it's in Amazon's best economic interest to normalize and associate good feelings with the ideas of endless consumption and perpetually repeating purchasing.
The only "junkie" vibe I got from this was the k-cups.