I candled my het pied x het pied clutch a few days ago and noticed that on one egg in particular, I could very plainly see a little reduced normal pattern through the shell.
The snake in the egg that is standing up seems to be a little bit patchy-looking and I would bet that there's a pied in there, although it's very difficult to see it in the video.
Watch in HD if you have the patience. Thanks for looking!