A possible approach to the Comparative Video Essay is Genre.
Remember, genre is essentially a comparative essay between two films in the same genre. Often these films, as per the rules of the comparative essay, are separated by time and / or space.
To start exploring genre and a key research task is to start understanding the conventions of a given genre.
Task
Watch an episode of Mark Kermode’s Secrets of Cinema
Complete a set of notes on your selected genre.