What a great way for some lousy punk thieves to try to ruin your weekend. It sounds like they knew the layout of the hotel well enough to block the video...if that's what really happened. Nowadays, it wouldn't surprise me if there was an employee at the hotel that was splitting the gains from the thefts in their lot.
Thieves like that will never have much in this life, and I can assure you they will get no enjoyment the next life. This is as close as they'll get to paradise unless they change their ways. Small consolation, I know.
Hopefully, you're insurance company will come through for you guys. Sorry for the loss.