I checked out that video, and it's a very nice looking baby. However that isn't a new Dumerils morph. Dumerils are born a lighter color and generally darken slightly as they grow. It appears that the belly is orange/pink on that baby because it's getting ready to shed. You'll also notice that the breeder hasn't posted an updated video in almost 2 years. I have seen some actual Dumerils morphs, but most of them are fairly uncommon.
Here is an example of one of the babies I produced taken right after her first shed.