If he had fuel cans in the area they would be used to defuel the helicopter- to reduce the fire hazard & reduce the weight making it easier to handle.
The other videos that 206fan had links.
just follow the links.It's a real volume to learn from.
(You even look close you can see the blade scares on the cement roof & how the blades were damaged)
If you ever had to auto a 300 you would be looking between your toes for where the landing would be,
Glad they walked away- Nice bit of luck.
The group on the roof looked a Cal Trans road crew (1 worker & 25 supervisors)
Fly safe.