Spoiler alert: Not much.
After a few hours I hauled up about 12 crabs. 6 were keepers.
The action:
00:03 Rosie supervises launch
5:38 First crab starts trying to get in. You can hear him but can't see him.
6:55 First crab visible at left door. He's having trouble getting in.
10:50 First crab enters the trap from right door.
15:50 Second crab can be heard trying to get in.
18:01 Second crab visible at left door
20:16 Third crab(?) magically appears inside the trap. Maybe he was small enough to fit through bars. Second crab still audible.
21:27 Second crab finally make it in.
23:08 Crab four forces his way in. Crab 5 comes a minute later.Left door pretty much blocked.
35:55 Better view of bait box