It was try!Swift New York, back in 2017, or so. I don't think they published vids, but maybe. I'll have to go look at my badge, to see which one it is.
That was a lovely talk and changed my perspective on C++. My impression was that C++ is a ancient language with lots of footgun.
The talk reminds me of its value. C++ is still evolving. Improvements are introduced slower compared to other languages, but still, C++ is making progress and many found it pleasant to work with. It just need more time.
https://www.tryswift.co
[UPDATE] It was 2019. They have videos, but hers (and a few others) aren't there.
[UPDATE 2] Found it. It isn't linked from the main site, but is on the YouTube playlist: https://www.youtube.com/watch?v=CZOVnlwWPZk
It's a really good talk. I like her attitude.
This is her: https://www.savinola.com