Two talks on the internet. Rather different subjects. It's a funny medium, not at all comparable to a live audience in the same space. I find it lessens fluency. Not tv. Not radio. Maybe a conversational tone would work better than my rhetoric.
Re. the Dante lecture. As usual, my first talk on a subject was bit experimental (i.e. not under control). I am also out of practice, not match fit.
American Chemical Society talk on microscopic geometry and representations of the Corona Virus:
Leconfield lecture of the British-Italian Society on Dante and the Art of Divine light