Any idea what this is?

[WildBill]

You aren’t the only one experiencing this. I have seen and there is another post about it:

"smoke like" motion alerts

I’m a new user, so not good enough to upload anything. We had several motion alerts from our living room cam last night and it looked like smoke clouds moving upward. Our apartment wasn’t on fire and we were all in bed. Any idea what could’ve caused it?