A lot of this creator's videos and pages went private around 2016, then removed around 2018. He went by many other names/aliases online, such as Arthur Corbett (as it's listed in the episode's credits), XPenguinXgirlX, Animoe-Klub, xNonsenseWorldX, xxxmajinbooo, Ringo-Wrench, Oka Loka, and finally Okami Landa. 

Googling Okami Landa's name leads to a page on the US Department of Justice, detailing his conviction in 2016 for possession of CSAM, and then arrested again 2021 for possession, again, of CSAM, along with sending a threatening letter filled with a suspicious white powder (that was later determined to be safe) to an FBI Agent that had arrested and interviewed him during his first conviction.

You will find a lot of reuploads of Nonsense World online referencing him as a disgusting sex offender, as well as commenters lamenting over discovering his work for the first time in the late 2000s and unable to be shocked by the discovery because of his early fascination with prepubescent anime children.