Your Grammar Sucks is a series made by
Jack Douglass as part of Jacksfilms, and is arguably its biggest series to date. It began with Jack reading YouTube comments containing spelling and grammatical errors, hence the series name, but expanded to Twitter and Facebook as the series progressed.
The series debuted in June 2011 with its first video (currently at 1.7 million hits), and eventually grew on to turn the comments into songs and "special editions" (Rebecca Black, Twilight, Justin Bieber, etc). For its 40th episode the series turned into a sketch comedy compilation of skits, and that style was reused for the 50th episode special. It has also released two "best-of" compilations; the first one debuted in June 2012 at 20 minutes long. The sequel debuted exactly one year later at 27 minutes long.
By now the series is at its 55th episode but its 56th has been delayed to due to the fact that Jack himself has been placed into a hospital due to severe abdominal pains as he revealed on his second channel Jackisanerd on 2013-08-07 with his video My Tummy Hates Me.
The series also includes special guests such as Toby Turner, Sean Klitzner, Vincent Cyr, PewDiePie, and Anthony and Ian from Smosh. The series airs on Fridays--"every damn Friday", as the videos call it--but once defied its own rule and released "every damn someday".
Taken from:
http://jacksfilms.wikia.com/wiki/Your_Grammar_Sucks