Many doubt the existence of the supernatural realm but there is proof everywhere in the form of video and audio evidence. There is no plausible conclusion as to the origin of some of this evidence. Not all of the evidence is useable there are many hoaxes performed but they are easily identified as such.
When you take out all of the hoaxes you are left with a small margin of video and audio evidence that cannot be defined as a hoax in fact there is no explanation for some of the evidence.
This is some of the most credible evidence. It is rare to find something that cannot be proven as a hoax.