Their videos are produced and edited by their father , Paul Merrell .
The Merrell twins started making YouTube videos in 2009 , but they really started to grow their YouTube channel in 2012 - 2013 .
twins ' videos are produced and edited by their father , Paul Merrell .
The Merrell twins started making YouTube videos in 2009 , but they really started to grow their YouTube channel in 2012 - 2013 .