I should point out that PageDash also tries to handle saving nested pages and iframes, I'm not sure it's something that other archivers try to do. Also Web Com

I should point out that PageDash also tries to handle saving nested pages and iframes, I'm not sure it's something that other archivers try to do. Also Web Components (custom elements, shadow DOM) support is definitely do-able and something for the pipeline. It's not something even the Internet Archive is capable of right now. Wayback Machine's youtube.com archive is blank.