Sorry but you arent finding good stuff on youtube
science and technology "how stuff works"I know these two that might fit that parameter:
The Why Files.
He covers a lot of paranormal and conspiracy stories but with an honest approach and actually researches to find the facts behind the fiction. His videos are very entertaining as well.
I love how he tells the stories at the beginning with no judgement or bias and tells them as if they were all true and then he goes into what he found regarding what was true or not.