It is very pleasant to experience high-quality live webcasts from the Perimeter Institute for Theoretical Physics. I especially appreciate your choice of some lecturers whose ideas are unconventional, radical and/or controversial.
I would like to make one suggestion for improvement. On the webcast, I always try to follow viewgraphs since the subjects are highly scientific sometimes with equations. However, the sight of viewgraphs is often interrupted by the shot of the speaker or that of the audience, disrupting my train of thoughts.
Therefore, my proposal is to focus on the viewgraphs, i.e., semi-permanently show the viewgraphs on the upper left-hand side and the speaker or the audience on the lower right-hand side, as it is already done quite well in certain portions of your production. The speaker can make use of the cursor on his/her computer rather than a hand gesture in front of the viewgraphs obstructing the view of the equations which I try to understand.
An example of well laid-out presentation is the Fermilab Lecture Series on YouTube's Fermilab channel.
