A cute video has emerged from Belgium of a cat opening the little flap on the side of a box.

The footage, filmed on December 12, shows Swakke the cat playing in the box, before pawing the little door open.

The filmer later wrote online: "Swakke, like all other cats, loves boxes.

"But this one was more fun as it had a little flap that was like a door, and he duly opens it when knocked on."