The Sidemen (formally the Ultimate Sidemen), created on 19 October 2013, are a British YouTube group who have boosted in popularity throughout the past 6 years. They are all good friends, play video games together and have created a commercial brand from their name.
The name is an allusion to a term to refer to those who are "behind the scenes" in a group and are much less noticed than the main people. Originally, Simon was a "sideman" to JJ and Tobi was a "sideman" to Josh.
From 2018, they have uploaded weekly videos to their group channel under the banner of "Sidemen Sunday". They also have a second channel called MoreSidemen, where they upload compilations, behind the scenes, and weekly videos under the banner of "Sidemen Saturday" or "More Sidemen Saturday".