Did or did not Zimmerman visit the ER the next day? That visit and diagnosis if it occurred will be more important than some diagnosis/speculation via a video feed.
Not ER, but yes, a medical facility. Decision to not stitch the head wound(s) because they were already healing, and to stitch would require cutting them open again.
The police evidence folder includes the report or reports from the tending physicians. ABC, and Gutman in particular, is just making noise like a baby does when it wants attention.
***Did or did not Zimmerman visit the ER the next day?***
If Zimmerman had a broken nose, the area around the break should show heavy bruising the next day, almost like black eyes.
Years ago when involved in a car accident the EMTs told me to see my Dr the next day, that immediate medical (life saving) attention was not needed. I had a broken rib that needed an X-ray to diagnose. (Our X-ray department in the local hospital was not available during the night hours.) Woke up the next day feeling I'd been hit by a Mack Truck instead of a VW bug.
His medical evaluations would be consistent to my experience for what it's worth.