Jim, I honestly think genre is irrelevant for this demo.
I said pop, just from the perspective that it is more universal, but I respect country, rock, R&B or any other genre/style as long as it can be used as a good visual example of making a complete song structure, with nice intro, transitions, ending, etc. Main task of this project should be to show how muscle features of BIAB can be applied in making complete song smile

If it ever happens, I think it is wise for the person who is going to be making video to choose the style he/she is more comfortable with, so whole process goes smoother. (just not abstract electronic or rap please... nothing against these styles, but I feel they would be a poor choice for this task)