Matthew joined TKKS in late 2020. However, the OutClassed Series has interestingly existed before he joined TKKS, through the OutClassed YouTube channel & Future Cartoon Series. However, episodes of Future were intensely low quality & filled-to-the-brim with unusuable material before Matthew joined TKKS. (Future's Season 1 was made before Matthew joined TKKS & Future's Season 2 was made after Matthew had joined TKKS. Watch Season 1 & Season 2 to compare.) Matthew became Amarcio's friend in early 2020, however, he didn't join TKKS until late 2020.
If you are in no rush & would like to contact the owner/creator of the OutClassed Series, contacting Matthew is recommended.
(WARNING: It is unrecommended to attempt to contact TKKS by contacting Matthew if you have an urgent situation, as there is a likely chance he won't receive your message until much later. Matthew does occasionally use "Do Not Disturb" mode, so there is a 1 in 10 chance he will have Do Not Disturb mode on. If he has it on, don't bother trying to contact him again, just contact Amarcio or wait until he turns it off.)