Some new devices/monitors such as the Glidescope Core or Storz CMAC 8404 now allow viewing two video feeds on one display, either as a “picture-in-picture” or side-by-side display. Here is a demo of split-screen dual endoscopy with Macintosh-blade VL and optical stylet:
Dual endoscopy using split screen. It would have been good to have warmed the optical stylet (right) to prevent fogging of the lens. Orienting the VL on the left and stylet on the right improves coordination between left and right hands holding the devices.