As Dr.Ray mentioned from the beginning of the video, pictures/graphs are essential components for learning. A combination of words and graphs maximizes our learning ability. However, in the video there are only few pictures so I believe this is where Dr.Ray broke the rule.

Personally, I broke many rules in my past presentations. For instance, split attention principle is the one I broke most. In previous presentations, I always have related pictures which is good. However, I always put text beside the pictures instead of words.