On his standalone channel, chuggaaconroy joined YouTube in 2006 and has since uploaded video covering all sorts of games. From his first videos about Earthbound, through The Legend of Zelda: The Wind Waker, and all the way up to Animal Crossing: New Leaf, he tends to focus on games from various Nintendo DS gens.
He does have a second channel called The Runaway Guys, which is a collaboration between himself, ProtonJon, and NintendoCapriSun. They also love making videos based on DS games, and are currently uploading content about The Legend of Zelda: Tri Force Heroes.
The reason chuggaaconroy is on this list is because his content is always happy, clean, and to me, it is clear that he makes an effort to appeal to younger gamers.