It's quite a niche thing!
RKG has it's origins as a series made by three friends that were working at IGN mainly known for creating "Let's Play" videos of them tackling the FromSoftware games such as Dark Souls and Bloodborne.
https://www.youtube.com/@preparetotry/playlists
Eventually the three friends (Rory, Krupa, and Gav) all left IGN to start their own company (called RKG Video) funded by their community on Patreon, continuing playing more of the FromSoftware games including Dark Souls 2, Demon's Souls and Elden Ring.
https://www.patreon.com/rkg
https://www.youtube.com/@RKG/playlists
The characters that they created for these Let's play videos (all named Finchy), have all been given backstories by the friends, and are the characters that inspired these games.
There's now hundreds of hours of the Finchys and their adventures across both channels, but the very first episode is this one: