u/ForceOdd9714

So my in laws’ home security system went off on its own a couple nights ago and its never done this before. The alarm system says the backdoor triggered it but no doors were open.

Around the 27 sec mark you can see an orb like thing cross the window. It seems like dust but we don’t think it is since theres no other dust particles seen in the video. Also looks a little large to be that. What could it be?