Exactly my thought, the video seems satirical. Especially when the guy pours beer in the cup and it tells him that it's beer, after which he gives it a "that's right" nod.
It's more that it puts the info into your phone automatically. Of course you know it's beer, but writing it down in a food journal is a bit of a hassle, and doing math on it to see how many calories you drank each day this month is tedious enough to be worth automating.