how much of cryptozoology and 'supernatural sightings' is real?

http://mysteriousuniverse.org/2018/03/military-encounters-with-supernatural-demonic-entities/
https://www.youtube.com/watch?v=OXU82vsDhUA

there's no reason to outright dismiss they say even if you're not sure you believe it. especially with army stories where entire groups saw things like the first youtube story.