Context for people unfamiliar: this is a video-assisted intubation. The white bit on the screen is the larynx (vocal cords), and the fold below it is the opening of the esophagus.
(Edit: I was just looking at this and that is the fanciest portable defib/resus pack I have ever seen. The ones I’ve used were jank as heck and only had a screen for the EKG readout and vitals.)