Basically Canada is complaining that the United States (God bless it) used some video footage from Canada as part of a tourism campaign, in particular some scenery of Niagara Falls.
Here's what I don't get, the video also shows monuments from Washington D.C., the Grand Canyon, the beaches of Hawaii, etc. Why is Canada the only state complaining? What makes them so special? It might be about time we kick these yahoos out of the Union.