The human range of hearing is only generally stated at between 20-20k Hz. Do you really believe that is a hard limit? Is it really so difficult to believe there are outliers? It is far more common to find individuals with supersonic hearing that can hear sounds above 20kHz, called ultrasonics, some that can even hear frequencies as high as 28kHz and higher. But even most people can hear sounds as low as 12Hz under ideal laboratory conditions. But frequencies much lower can be heard by a minority of individuals.[1][2] I have no trouble whatsoever hearing this[3] or this[4], though it... hurts. Diesel school busses are the bane of my existence, putting out frequencies between 5-8Hz that I can hear passing from 10 miles away from inside my house. If they're within half a mile, it kills me. There's no escape from it, plugging ears does nothing. You'll never, never ever see a black hole or dark matter, but I bet you have no trouble believing in them. But you're skeptical of subsonic hearing because Google sucks. Take my word for it, and be skeptical of Google instead.
Hate to break it to you but everyone can hear those videos, they're not what they say they are. I downloaded the audio of the one that claims to be 1Hz and analysed it - most of the energy is between 40 and 60Hz, with some as high as 100Hz. I've uploaded a screenshot so you can see for yourself: https://i.imgur.com/GSpa8ZJ.png
The thing is, I didn't have to listen to the video to know it's BS, because I know there's no consumer audio equipment (speakers _or_ headphones) that will reproduce tones lower than 20Hz. As a matter of fact you'd be hard-pressed to find a subwoofer that will even do 25Hz. Go ahead, prove me wrong.
Note that I'm not trying to disprove or diminish your claims of what you personally experience. But I'm also not going to "take your word for it". I find it very hard to imagine what 1Hz "sounds" like, and so far nothing you've provided makes that gap any easier to bridge.
