Want physical evidence? Research Dr. Roger Leir. Took out several alien implants had them studied at labs, including Los Alamos. The metals found in them were not from this earth, several of the implants looked exactly the same, the implants couldn't be cut with a surgical blade and were put in with no inflammatory response. He's been getting some attention recently on the discovery channel and in the X conference, no one can deny his evidence. There's so many claimed abductees, most famous being Betty and Barney Hill, passed several lie detector tests and each told the exact same stories under hypnosis.
There's so many cases of extraterrestrials it's hard to deny. The most famous case of all the Roswell incident was really a ufo crash just covered up by the government. But look at the more recent post-Roswell interviews. Former lieutenants, high ranking officials who once tried to cover it up admitted it was real. There were deathbed confessions, a note saying the incident was real after the witness had died! Even today very high ranking officials and astronauts are saying they exist. Astronaut Edgar Mitchell, scientist and 6th man to walk on the moon, grew up in Roswell and says that there's no doubt in his mind that it was real.
If you want ufo videos just browse youtube, there are hoaxes of course but many are credible. Do some research please, you'll learn a lot.