I'm just dipping my toes into lab diamonds, and have found a few EC diamonds with these blurs. IGI cert says polish is excellent, so it isn't a shoddy polish job. Is this internal to the diamond? It's CVD, if that matters? The diamond is also graded VS1, so it isn't an "inclusion"?

Link to video of diamond since it's a bit hard to tell in still photos.

Link to video of diamond since it's a bit hard to tell in still photos.