Shaun and Jen
Shaun and Jen (S&J) is a leftist channel that critiques conservative media and YouTubers, generally on solid grounds, and generally at extreme length
That channel was originally let's play channel run by two friends, Shaun and Jen.
Shaun began making videos about other YouTubers (such as LeafyIsHere and CinemaSins) in 2016, and soon after began making videos refuting the arguments of popular right-wing, alt-right and anti-SJW YouTubers.
The videos gained more popularity, when new wave of leftist youtubers showed up on YouTube through their critiques of right-wing politics.
Jen didn't participate in these videos beyond occasionally drawing the thumbnail art, and eventually left for Twitch.
By September 2017, the title of the Shaun and Jen channel was changed to simply "Shaun" pending a new name. The symbol of the channel is a human skull wearing sunglasses, allegedly in order to "reclaim the skull" from the alt-right.