I've finally watched one edition of the documentary Loose Change last night (2nd Edition, 2006), and I found the websites listed at the end are all defunct. I looked them up on archive.org, and I feel these sites hold a wealth of information. 9/11Blogger.com in particular still have working videos.
These are the last captures of the blog: https://web.archive.org/web/20241109170309/http://911blogger.com/
Pre-redesign: https://web.archive.org/web/20160309230126/http://911blogger.com/
https://web.archive.org/web/20111213035115/http://911blogger.com/
Some of the websites have links to other websites that may have been lost to time: https://web.archive.org/web/20040803075718/http://home.earthlink.net/~killtown/911links.html
It is a bit laborious to go through all the links, posts and its various screenshot dates. But maybe doing so, you'll find something that was lost, forgotten or not well-known. I have discovered a few interesting videos.
Posted by RookyRed