This may also partly be the fault of the AMV authors. There's entries in the database of Dragonball Z, Dragon Ball Z, or DBZ. Now which is it? Is it the same thing, are they different things? Who the heck knows?
Now if you're complaining that you can't download the AMVs, then you should donate money towards the Dangling Carrot/Golden Donut so that they can be hosted and then you can download them. Be sure you're logged in from the main site when downloading AMVs as well. If you're impatient, email the creator and ask
nicely for them to send it to you. Hopefully they'll still have it and be able to send it to you. If not, you're plumb out of luck.