Although Ridddle does seem to have copied fairrider's mostly fictive stories, which were posted here on the 30.07. 2016, nearly verbatim in both his videos "Mysterious Creatures At The ‘Bottom Of The World’ (29.08.2016) and "Who Lives At The Bottom Of The Mariana Trench?" (05.04.2017), there is at least one much older source as well.

This russian article was posted on the 20th September 2011 by a person calling herself Margarita Trinity. http://survincity.com/2011/09/at-the-bottom-of-the-mariana-trench-live-monster/

Amongst its questionable claims we find (translated): "In 2003, the basin surveyed scientific vessel "Glomar Challenger". When was lowered down the "hedgehog", the receptionist sounds suddenly started to transfer to the surface of strange noises resembling saws grinding on metal. But the monitor will dim shadows 12-16 meters in height, similar to the fairy dragons. Each of them had a few heads and tails. Do scientists stumbled on the local "residents"?"

(And then of course we also have Steve Alten's whole "Meg" franchise which started back in July 1997.)

The idea and stories of megalodons in the Trench aren't exactly novel and groundbreaking in fairrider's case.

So, where did fairrider get the dubious infos from in the first place? The person doesn't say.

Moreover, here's you rightly criticizing Ridddle for using other people's work uncredited but I see you are using photos and graphics in your article uncredited as well. I find that to be inconsistent.