This video is a weired mix-up of different problems,

First it states, its about climate change (showing
the Tsunami in the Indian Ocean, how stupid is that?)

Then it lamentates about drinking water shortage.
(where drinking water is not something that can be exported
around the world, its a local commodity, and some regions
simply have more than others)

Also: hunger is a typical problem in countries with overpopulation,
obesity is a problem in countries with low population growth.
Figure out what the actual reasons for hunger are..

Rice fields are also a huge contributor to methane production,
this fact is not stated.
So there is no simple "You should eat this" as valid argument.