The patient in this video has ethnic skin tone and acne scars deep enough to require the treatment most practices would refuse.
Dr. Emer performed rebirth: deep fractional erbium first, creating channels that release blood and remove scar tissue, then surface erbium to blend and smooth the top layer. The cheeks, where the scars were worst, received the deepest treatment. The rest of the face was feathered into the hairline and jaw so there are no visible lines when healed.
Immediately after the laser stopped, Dr. Emer applied bio rain, the patient's own blood plasma mixed with exosomes, stem cells and PDRN. That mixture clots the blood, cools the skin, and starts repair before inflammation can set in. A cooling device followed, bringing the skin temperature down and reducing pain.
The blood you see in the video is intentional. The plasma aftercare is what makes the protocol safe on darker skin. Without it, the risk of hyperpigmentation would be too high to justify the depth.