YouTube is continuing to push the massive appeal of its online personalities and the possibilities that exist for advertisers to get involved with them as part of its Google Preferred plan. Last year, it took to TV in the US to promote the channel with ads featuring Michelle Phan, Bethany Mota and Rosanna Pansino and it followed that up with ads starring Epic Rap Battles of History and Vice News. Now it’s employed the services of The Slow Mo Guys, who have 4.5 million subscribers and have clocked more than 438 million views of their videos to date.