[lolive]

As far as i understand, Polymer (and Web Components, in general) permits to define custom HTML elements.

What kind of custom elements are in the (insanely unreadable) Youtube main page?

[Vinnl]

The Polymer philosophy appears to be more of "make everything a custom element", i.e. up to the entire app (e.g. "<youtube-app/>", "<comments-section video-id=''/>", "<related-videos video-id=''/>", etc.).

[nawitus]

Did YouTube switch to Polymer yet? I think only the new design (https://www.youtube.com/new) uses it, and it's not yet switched on by default?

[Macha]

Google do staged rollouts, I got the new YouTube design last week