Helping a buddy pick up a few things or possibly something else? They first drove past our house 2 minutes before the start of this video capture. When they return the guy in the dark jacket appears to be carrying a desktop computer.
the audio from the missing 10 minutes would have given you a better idea. I'd ask the neighbors if they are missing anything that looks like what they are carrying. Sounds/looks like they left the car running with the lights on but they locked it and didn't' seem to care about the locking beep....
They are in no hurry, or are they concerned about what is happening around them. Either they are real dumb, or probably just picking up some things they don't want their parents to see.