If you're into WebGL dark arts, Ricardo Cabello (mr doob, threejs) likes to showcase the latest techniques ;)

Ricardo Cabello - Creating VR (and AR) on the web

https://www.youtube.com/watch?v=8PzmjNgZyto

My personal favorite speaker on this topic is Chris Heilmann[0]. He's been in the trenches for a long time and highlights a lot of issues in webdev that are often overlooked, like accessibility, and a common thing: over-engineering.

https://www.youtube.com/results?search_query=christian+heilm...

I saw someone create a web app for this on twitter a few years ago where you could view them by category and submit yt links as well, but I can't find it sorry, will let you know if I come across it again

I don't know, maybe CodeTalks [0] is what you mean.

[0] https://codetalks.tv/

Would be interested also. :)