YouTube sensations The Sidemen have visited a Kent spot to film content for a new video. The group were spotted at Reuthe’s The Lost Gardens of Sevenoaks yesterday. Founded in 2013, The Sidemen is made up of seven best friends, including rapper and boxer KSI, who between them have 130 million subscribers on YouTube. They produce content showing various challenges, sketches, and video game commentaries. All the group, except KSI, were at the site yesterday, as well as rapper JME. They were filming for a video which will air this weekend. All they would reveal is that it will involve “a series o…