An interesting topic for a presentation/paper in our seminar could be the cultural representation of death. This often involves media technologies, or is connected to media fantasies.
If you would like to know more about it, I would suggest you start by reading a very interesting book, Philippe Ariès’ Studien zur Geschichte des Todes im Abendland.
Another interesting presentation could be based on some contemporary movies which addressed the topic of death and also feature interesting references to media technologies, such as photography and sound recording. Some titles: The Sixth Sense (1999), The Others (2001), Ghost (1990), The Lovely Bones (2009).