The first kind of story continuer takes a passage you paste and writes what comes next, in words. It is quick, it is useful when you are stuck, and for a lot of writing it is all you need.
The second kind is for people making a series. For them, continuing a story means the same people look the same, the rooms are still the rooms, and the new episode starts where the last one stopped. Text alone cannot hold that, because a description of a character is not a face. A continuation has to carry pictures and notes about what happened, not just the last paragraph.
This page is about the second kind. Reelfo does not write prose chapters. A continuation here is a script, a storyboard and shots, and, when you choose, video clips cut into an episode.