In the pic it looks like it's about the same color as your bp but the video definitely shows it. I'm not to sure it being a from the live prey either but I guess you never know. I hope someone else is able to give some insight, I really want to know what it is. But yeah maybe your snake is use to not having hides. When you get the reptile basic ones try showing your bp, like put him down with his head right in front of the entrance. That is how I always showed mine new hides. At least you will have them for another snake and when you get your new one he or she will feel very secure in them.