As a follow-up to my post last night, I'd like to ask: How has this been around for a year and a half and this is the first time I'm seeing/hearing of it?! While there was a track right near the beginning that was not a film version, I heard some others later on. I just listened to the start and then skipped to the end to see if all the final battle's music is there (it is). This also appears to include music not used in the movie. I cannot tell you what it is, or why it's on YouTube and has not turned up anywhere else in higher quality (or why no one in the comments is talking about how it includes unreleased music), but it is a very curious find, indeed!
I also found it weird that not one living soul cared about questioning about it. It may not include all the film versions, but most of them (from what I know about this score) are there. It DOES also include unused music, never heard before, and other cues that were only available with SFX. I was also surprised when I found it, like, why haven't I seen this before?!
---------- Post added at 10:55 PM ---------- Previous post was at 10:52 PM ----------
This is the only other mention I found of a complete score.
http://chrono-score.blogspot.nl/2011/04/alice-in-wonderland.html
The unreleased cues in the youtube link more or less match the ones on this site.
I posted a comment on that blog entry asking where the guy got the complete score, but never got an answer. I'm assuming he created the titles (as he said he did) based on the YouTube video.