LambdaConf keynote: Jonathan Blow on the Jai language [video]

The bottom-right camera view of Jonathan Blow and its audio do not match exactly the timing of the screen capture that fills the image. There are several seconds of delay.

It can be seen clearly at this point: https://youtu.be/RIYGaSBKy3w?t=1652 The most obvious moment is when he raises his hands gesticulating but the screen capture shows him moving the cursor in Emacs.

That confused me in some earlier points where he was mentioning things that were not visible on the screen until later.

Still, the talk is worth watching. I am particularly interested in the use of metaprogramming to ease debugging by gaining visibility on what the program is doing.

Edit: the delay has been reported in the YouTube comments and they say they will fix it and re-upload.