I jumped through the video a bit, this is the first time I’ve heard of Marjoe, so I got curious. I saw lots of the “Praise Jesus!” and “Hallelujah Jesus” preaching and hollering, and some candid moments where he was just chit-chatting, and then the end where he doubts it all. An exciting show with all that energy, but so strange in my eyes. At least he had a change of heart as an adult, children eventually grow up to question and doubt their past, thank the Lord. 
“Leap of Faith” with Steve Martin, Liam Neeson, and Meatloaf might have been modeled after that “Marjoe” movie. “Leap of Faith” was focused on a man “Jonus” who toured small towns across the USA, set up a big circus tent, and performed “religious revivals”. But the Steve Martin movie was done with a vein of doubt through-out the movie. Though “Leap of Faith” was all fiction, and “Marjoe” was a real documentary, I’d still recommend “Leap of Faith” to skeptics because it was very realistic, but done with that good vein of doubt, and a lot of heart too, and over-all excellent quality film, rather than low budget one. 
Marjoe has an acting career. He appears in that A-team video [21:40] as a bad guy.