There are for sure food shortages. The price of beef has gone up in my area by something like 50 cents a pound depending on the cut of steak it has gone up anywhere from 1 dollar to 3+ dollars a pound. Prices don't climb that high in a year unless there is a disruption in the supply chain somewhere.
Seran is an absolute moron if he claimed there aren't any food supply shortages. Just because most of us said they haven't seen anything like in that one video you posted doesn't mean everything is great. I have seen plenty of empty shelves for both food items and non-food items.