Interesting problem it does however give me a "I have a solution please give me a problem" vibe. What use cases are you trying to solve here?
Who knows how difficult it will be to get them to render properly in X years to come, even the webpages themselves were stored. Imagine having for instance every archive.org link complemented with a video of each URL, scrolling down the web page to document what it actually looked like then, complete with ads and everything.