I was able to run multiple browser windows, multiple VLC windows and connect multiple Blynk video widgets (max: 10) to ESP-EYE chip. The delay on the browser window was almost unnoticeable. In VLC you notice a 1 second delay probably due to buffering. Blynk performance all depends on the phone, so no comments there.
This is incredible considering the size of this thing! The camera on ESP-EYE is actually quite good.