Horus: Prince of the Sun, also known as Hols: Prince of the Sun, is the first film on which Hayao Miyazaki worked. It was produced by Toei, and apparently because of the attention paid to it from Youtube uploads, Toei decided to have them ALL taken down and put up the god-awful English dub on Hulu. I don't know what they hope to get. They will not get any money for this. It's from 1969, for Pete's sake. No one but hard-core fans care and none of them are on Hulu because Hulu sucks.
Thankfully, fans continue to upload the subtitled version to Youtube, in defiance of Toei's stupidity. This newest version is great, being available in glorious high-resolution. Enjoy it while it's up!
UPDATE: And down it goes. Toei, if you're reading this, from the deepest part of my heart, go fuck yourselves.