"No, no, ring this doorbell. That doorbell will give you a rash."
"400 year old paintings" - why couldn't people who lived 400 years ago paint something nonfictional?
Why do you assume every picture of what you perceive (based on cultural and societal conditioning I mentioned earlier) to be a UFO is somehow absolute proof of the existence of aliens, and better yet, that they've traversed the void of intergalactic space to come shine some lights in the sky or make crop circles?
"Countless pictures and videos of UFO's" - do you know what Photoshop is? Do you know what 3D Studio Max is? Have you ever seen a major motion picture at any date later than 2000? Why would you assume these images and videos couldn't be fake?
"Even covered by news stations" - ...you know what else news stations cover? Deaths of celebrities. News stations jobs are to gain ratings (viewers), it's not a surprise why there would be countless news stories related to 'UFO's' and absolutely zero physical evidence. In the end, this actually harms the real cause, things like SETI and NASA, it diminishes their credibility because they get lumped in with the crackpots who think every flickering light in the sky is a little green man with big black eyes from outer space. The ignorance is astounding.
"Millions of people could be fooled by their senses" - Yeah, because millions of people are made of exactly the same thing, put together exactly the same way, and are subject to exactly the same every day influences. Big surprise, I know!
And yeah, news stations showing the vids means absolutely nothing (to me at least). Half the stuff they say isn't true. Like their reincarnation thing is just to get views. So are the UFO vids.