Doomed islands, self-discoveries, supernatural detectives: when web series dig into mystery

Mystery is quite a loose genre, relying on the vague premise of something untold that engages a discovery process; apart from that, it can blend with anything else. But on the other hand, its loose frame allows more liberty and variety compared to what other stricter genres can do, so that the overall output is quite variegated in itself.
Now, web series creators, generally, love freedom. Even if this freedom means referring deliberately to preexistent works and following their path without anyone breathing down their necks. So it’s no surprise that mystery is well represented on the web.