You see sprite comics mimicking famous scenes all the time, so why not mimic famous scenes from television, film, anime, other games, etc in Graal style in a video. For example, Scarface, a specific head made for the characters off the film, can use the soundtrack, even the voiceovers maybe. With videos like this you can get a wide range of styles, like the Scarface one I mentioned (the guns, etc) could do Zelda (fantasy) Star Wars, etc etc and it'd show off our diversity. You would then attract fans of this external media, and maybe even some of the spriter community for development
In short, the recreation of famous scenes from popular media would be a good way of making Graal shorts for advertising.