You just need to look deeper. For example:
Jango - Link - TF.N changed the address to all fan films without putting an automatic redirect from the old address.
Fett vs. The Empire - Link - This Quicktime file is right there on the page.
The Dark Redemption - Link - Same issue, hosted at TF.N.
Dark Uprising - This has disappeared. Official site is gone, and nothing off Google suggests a new place. Maybe someone downloaded it? BFFC can host video.
Shadows of the Empire - Link - Again, the file is right there on the site. It's a little complicated to download, because it's a very large file.
All in all, links go bad. You can always e-mail the host of a web site to ask. But links to external sites are the responsibility of other site owners.
As for other film sites, you covered the primary ones, except the TF.N fan film directory.