Why is any of this information being presented by video? AMD's software optimization manual could use some love

Because it was done at Microsoft's Game Stack Live 2021 conference.

I'm impressed by the sign language . when it comes to new technical words how does one make a new sign for it ?

It seems to be that closed captioning would be more useful. But I'm not a sign language reader.

It might have been a live event, but captions would be better, indeed.

The speaker is also too fast for her to catch up, and she has to drop a lot of things.

On a side note, the speaker spends a while just reading what’s on the slides, that, with too much text on the slides, is not great.