Why people might think it's intended to be comedic
I noticed that the author wrote, "It's strange, for some reason people keep assuming that this drama is supposed to be a comedy." Well, if you look at the "Author & File Information" panel it says that this video is in the comedy genre. That might help to explain why people think it's a comedy. I don't know who chooses the genre, but if it's the author then I don't think you should be surprised that your selection alters peoples' expectations.