The special will feature some of those early videos, including appearances by the late Ryan Dunn — a member of both the “Jackass” and “Viva La Bam” crews, as well as a long-time friend of Margera — who died in 2011 in an automobile accident. “CKY: The Greatest Hits” will feature conversations with members past and present, including Margera’s parents, brother Jesse, Chris Raab, Rake Yohn and others. Also appearing are “Jackass'” star Johnny Knoxville and director Jeff Tremaine.