Two things that never left my memory from watching this in my childhood: the lady eating the Guinea pig, and the reporter sneakily entering the alien spaceship with a massive VHS camera (because there was nothing smaller).
The bit that sticks in my mind is a shot of some giant pipes heading up into the sky, to a ship. Apparently they were taking Earth’s water? And I think someone read a gauge indicating that one million gallons/second were flowing? I was pretty young at the time.