Cheat: to get an unfair advantage, especially in a game.
In the NFL's report, they used the phrase "unfair advantage" in describing the filming practice. So, according to the people who run the game, he cheated.
Maybe you should bring it up with them. They obviously don't understand their game as well as you do.
yeah, everybody else including satellites millions of miles above can film, but ole Belichick can’t. Riiiiiiiiiiiight.