I had higher expectations - both on the details of the presentation, the "scripting" of the webinar and the quality of the transmission.
For example more technical details, something more than what would be shown on a display sign in a museum. There are very nice video presentations of high quaility on Youtube - e.g. on the channel Numberphile. Have a look how it could have been done: https://www.youtube.com/watch?v=G2_Q9FoD-oQ