The Office: An Unexpected Journey superimposes characters from Ricky Gervais and Stephen Merchant's classic sitcom The Office onto faces from the first Hobbit movie from Peter Jackson.
Freeman is seen as Tim Canterbury talking about his boring job in the guise of Bilbo Baggins, while David Brent has been transformed into Gandalf the Grey.
"People say I'm the best boss, they go, 'Oh you get the best out of us', and I go 'C'est la vie'," Brent says while wearing Gandalf's wizard hat and beard.
Meanwhile, Mackenzie Crook appears as Gareth Keenan's new form of Gollum, and there's also a cameo of Ewen MacIntosh as Big Keith.
One particularly funny moment occurs when Elrond is seen giving a Powerpoint presentation.
The video was produced by Jonny Lang and Jason Burke of Eager Beaver Productions, who said of their project: "Like The Hobbit? Like The Office? Then you may well like this unique blend of those two worlds where David Brent (aka Gandalf The Grey) tells us all about his philosophy around running a regional parchment merchants in Middle-earth."
The clip is dedicated to "the genius of JRR Tolkien, Peter Jackson, Ricky Gervais and Stephen Merchant", along with a collection of humorous end credits.
Watch Martin Freeman discuss The Hobbit with Digital Spy below: