Occam's Razor.
Also, having the technology to fly light years through interstellar space, means that you should surely be able to construct a craft that doesn't crash on Earth (Roswell), or waste your time flying for years to dip into the atmosphere, do a little light show and fly off, or harassing a farmer in the middle of nowhere vs landing in Central Park.
The gimbal video and others have all be plausibly explained.
Everyone on planet Earth now carries the best photographic equipment in human history in their pockets. Where are 20MP pictures of flying saucers? Similarly Bigfoot (Bigfeet?), Yetis, the Loch Ness monster, and so on.