That's exactly right. Much of the beginner videos make use of visual hints like you say (images, props, etc), and none of these were taken into account in my a

That's exactly right. Much of the beginner videos make use of visual hints like you say (images, props, etc), and none of these were taken into account in my analysis. I do think it could be cool to do a 'visual' analysis of CI in the future where you attempt to measure how much context is present (or not) in each video and see what insights you could draw from that.