This is a funny but accurate documentary with a bit of acting explaining how the big lizard is being hunted for food by the nomads in the Sahara Desert of Africa, and hides in a burrow, and how the scorpion hides in the same place to get out of the heat, and to pay his rent, or out of gratitude for his host, (who knows with animals?), the scorpion does security duty to deter the nomads from catching the lizard. The scorpion sting is painful for several days.
Here is a translation of a funny short section of the narrative where at 1:14 you see the lizard in profile close its eye and the scorpion passing right under his chin: "These two species have a pact: the Arachnid never stings his Amphytrion (protector) and in exchange the Saur permits that his venomous guest feel at home."
Don't miss the close-up of the camel's feet right at the beginning!