Charlie Brooker and his guests have fun at the expense of religious TV shows in a way that you will never find on US TV. I had not been aware that there really is a TV show called Bibleman and that it ran for many seasons despite the low production values and the awful dialogue.
I watched part of an actual episode (below) and the beginning of it has a different origin story for Bibleman than the one shown in the above clip with the little boy. I am not sure how the two were reconciled. The creators, while clearly earnest about the Bible, are also self-consciously campy, and have clearly modeled their show on the Batman series.