Oh, just let go, have some fun! Dali is the very incarnation of fun, and Walt Disney knew a thing or two about fun, too.
Evidently this collaboration, begun in 1946, was completed in the late 90s with CGI fill ins. If those sorts of technical details harsh your mellow, maybe it'll ruin the experience for you. Didn't bother me a bit. Sometimes it pays to be a Luddite.
I'd never heard of this until a friend of mine shared it on Facebook. Not a Facebook friend, actually, but a guy that I've known since the 70s. I wouldn't have expected him to be the one to share this, because there are no power chords, no heavy bass, and almost no drums at all. But life will fool you. Some people do learn new tricks in their old age.