The image shown is the focusing of searchlights which allow you to clearly see the shape of the UFO within the illuminated target area.
The large craft seemed completely oblivious to the hundreds (500+) AA shells bursting around the ship.
It appeared to have a protective force field as no damaged was inflicted on it.
There were casualties on the ground, at least 6 civilians died as a direct result of the Army's attack on the UFO. The untouched UFO then slowly made its way toward and then over Long Beach, before finally moving off and continuing on, unstopped.
The military generals were ordered by the government to claim that it was nothing but a large balloon that they could not shoot down. Embarrassed, they eventually followed orders.
I have seen many types of crafts with different shapes. Some UFOs so close I could throw a stone and hit them. One so large it was at least 1 mile wide and 2 miles long. I have been taken and been on some crafts.