In the video, a person is seen putting a collar on a mountain lion. The person is wearing a grey sweater and is holding the collar in their right hand. The mountain lion is sitting on a black surface and has a leash around its neck. The person is using their left hand to put the collar on the mountain lion's neck. The mountain lion is looking around and seems calm. The person is wearing a ring on their left hand. The background is not visible in the video.