I think this year most of the talks were prerecorded and only the Q&A was live (not sure if the Q&A was video or not). I know in 2020 the talks were live. You

I think this year most of the talks were prerecorded and only the Q&A was live (not sure if the Q&A was video or not). I know in 2020 the talks were live. You can look at the "Behind The Scenes" section to see what they used: https://emacsconf.org/2020/ https://emacsconf.org/2020/