Alantutorial is a YouTube series created by artist and comedian Alan Resnick under a channel with the same name. The series started in 2011 and ended in 2014.
The first videos of the series started out as 'how-to' videos where the protagonist Alan tries to teach the viewer how to do mundane but bizarre activities, like how to fill a tupperware bin with dirt, how to watch YouTube online, or how to 'make mail square.' At first the series seems to be going for some sort of surrealist comedy.
Later in the series Alan seems to start to run out of ideas for tutorials until something strange finds its way into Alan's room and scares him and knocks down his Blue Chair (the Blue Chair is a reacquiring item in the series). This deeply upsets Alan, but he soon starts to make tutorials again.
Soon a video releases that shows Alan on a roof or deck spotting an adult female. Alan freaks out at the presence of this female and runs back into the house. A couple videos latter he goes haywire and destroys some of the walls. He is then locked out of the house and is never seen in the house again.
The videos get more bizarre as Alan clearly loses his sanity throughout the series. The gets captured by an unknown group and is put into some sort of chamber where he is forced to make tutorials for monetary gain by the unknown captors. The chamber gets more filthy and strange as the series progresses until Alan breaks a small hole in the wall and escapes - marking the end of the series.
The Video Series
The videos are listed in a chronological order, meaning the first video is on top and the last is on the bottom.
Many different claims about the theme had appeared over the course of the series in the comments. One is being that the series is about a totalitarian government forcing it's citizens to do a selected job, in Alan's case, YouTube tutorials.
Another claims is that it's a satire on YouTube itself, Alan represents youtubers with his tutorials representing repetitive content, and the captors being YouTube's staff. Some commenters had even extended this claim to represent social media as a whole.
As for the Blue Chair, many commenters said that represents Alan's last source of sanity due to how he grips on it, and vice versa.