@jamen It’s not a bat or anything to be alarmed about. It’s just small dust particles that appear much larger in front of the camera. The IR lights reflect on those particles that fly around in the room making them look much larger than they actually are. If you do a search on the forum you will find countless videos and posts about this same topic. See some of these threads in the link below and I’m sure you will some similar videos.
https://forums.wyze.com/search?context=topic&context_id=77425&q=Orbs&skip_context=true