Blue Iris

I have 3 video windows/panels showing in BI. Two have red lightning bolts, another has a white O in a red box.

My first instinct is to RTFM, but I can't find it. I've checked the website and can't find a link to a manual. Is there a list of icons/symbols somewhere?

The manual can be opened from the BI5 screen. Click the ? on the top left.
Might these be from the camera(s) ? Add screen grabs.