Here were some of the questions I found myself asking about your observational documentaries:
Could I tell what materials the work was made of?
Could I tell the context of the work and how people might come across it?
Could I tell the boundaries of work?
Could I tell the title and artist?
Could I tell a reason for filming what was filmed, and how it was filmed?
Could I tell a reason for when the camera moved and when it was still?