Normally, animal quarantine cases aren’t particularly high-profile, but when the dogs involved belong to Johnny Depp and Amber Heard they’re bound to attract a little more attention.

It’s almost a year to the day that Heard flew to Brisbane and failed to declare Pistol and Boo – the two Yorkshire terriers owned by the couple – at customs.

The dogs were “outed” on a trip to a grooming salon, thus embroiling Heard and Depp in a battle with the courts and deputy prime minister Barnaby Joyce warned the pair that Pistol and Boo must “bugger off” back to California or they could face being killed.

Heard has had the charges of illegally importing animals dropped, but pled guilty to the charges of making a false customs declaration. And, both being actors, Depp and Heard filmed a short video in which they eulogise about Australia and the importance of protecting the country.

The video, which was played to the court, feels like there must be an Australian agriculture minister behind the camera holding a gun.

The sombre, serious mood of the clip is probably a result of the couple’s exasperation at what has turned out to be a long, drawn out battle over something they probably didn’t realise they were doing wrong, although it looks like Heard might burst out laughing at any point.

Watch Johnny Depp and Amber Heard champion Australia, its people and the importance of declaring everything at customs, below.