I didn't mean to say video, I mean to say scene or content. Is there enough content or just a very short story?
Unfortunately, there is no separate storyline for The Farm. Unless you count the events of ep1 (the beginning of the whole story), we have 2 interesting events of Monica in prison in episode 2 (visiting Marcus), and only one event in ep3
(extremely interesting and revealing many interesting details). Without revealing all the spoilers, I'll just say that Monica is still expected at the Farm, but when and in what capacity she will go there is an open question. Most likely (unfortunately), sending her to the Farm will only be one of the 8 promised endings of the entire game (in the finale of ep4). Thus, compared to the massive scope of the main story, the content of Marcus' plot can really only be called a short story.
However, in the latest Ep3 updates, the game has a massive BDSM quest (which will be released over the course of several Ep4 updates) related to Monica's ordeal in Philip's basement, but it's not the same as Marcus' content, despite some similar BDSM elements.