In the video, two cats are seen sniffing and playing with a tray of grass. The tray is black and rectangular, and it is filled with bright green grass. The cats are both white and brown, and they are seen sniffing and pawing at the grass. The tray is placed on a wooden floor, and there is a gray carpet next to it. The cats seem to be curious about the grass, and they are moving around the tray, sniffing and pawing at it.