It's either the camera or a contrast touch up, both those snakes are the same. Look at the blushing inside the black, there's a big blush follow by a tiny dot over thickest part of it's belly which is what is best shown in both pics. There are also 5 consecutive dots leading towards the tail and a donut right before it, it's the same snake for sure.
I do think he might have touched up the contrast maybe in Photoshop but the snake is the same, the yellow definitely looks alot more vivid in his ad photo.