(Update: This video has since been removed from Youtube. Sorry.)
Taiyo no Ouji Horusu no Daibouken - The Great Adventure of Horus, Prince of the Sun - is now available in its entirety at YouTube. I chopped it into 10 equal parts, roughly 8:00 each; this way, you'll be able to watch at your convenience. There are no English subtitles (the fansub copy but subtitles on a seperate file), but you'll be able to get the general thrust of the film.