Ghosts, Sasquatches, alien anal probes, UFO sightings, strange voices/sounds?

Was watching stuff like this:

(Switch to Web View if using Tapatalk to see the video)

And it got me thinking.

There are definitely a lot of hoaxes and viral videos running rampant online but the strange sounds in the sky is one that seems to be hard to prove/debunk either way and its kind of intriguing.

My only experience with something strange (besides meeting some people who may have legitimately been under some demonic influence)

was a repetitious and very high frequency noise in my subdivision audible only within about a 25ft radius near a certain couple of houses while standing at a certain location in the street.

It sounded like a squeaky swingset or a metal sign blowing in the wind but very high pitched, a lot like your ears ringing and with a less frequent repetition (4-5 seconds before the pattern repeated). It was so high pitched that I could imagine many people would not notice it and I doubt that a camera would pickup the noise

That particular row of houses was on the edge of a bluff with about a 70ft elevation change and just more houses below.

I could be out riding my bike and go to that location any given day and i would be able to hear it. I brought friends to that location that could also hear it. The only type of machinery of any sort that would be running all the time like that seemed to be a central air unit, but it definitely wasnt that. The noise

was there regardless of wind speed, never changing tone/pattern and only audible within a small radius at that location.

It wasn't at all scary, and I doubt that it was anything paranormal but rather it was just something that made no sense to myself or any of my friends I showed it to and it still doesnt. The next time I am out that way I might check and see if the sound still exists.

Inb4