Gali the Alligator is an ad for the French crime TV channel 13eme Rue featuring cute, singing animal puppets and a big lumbering alligator.
Oh, just to warn you, the first line of the song goes: "Gali the Alligator is a puppet decimator ..." You can guess what happens next! (Whaddaya expect from a crime channel ad?)
Here's the spot, dubbed in English: Link [embedded YouTube]