If that clip is real, all of the de-saturation, oversaturation, black level crushing and mis-tinting of 2004 is totally unchanged. It looks to me like it doesn't even have the gamma boost, so I'm suspecting this is fake.

In fact, I am beginning to suspect that anything posted by anyone outside of official promotions is unreliable. Even the official stuff is only sort-of reliable, it seems.

Pagz: In late 2003, Lucasfilm did an HD telecine of the films, which they colour-corrected, added new effects to and had cleaned by Lowry. The 2004 DVD set was a standard-def downconversion of that. The HD version was always intended to eventually become the highest-quality master (i.e. for blu ray), but it seems they did attempt to fix a couple issues people complained about by taking that master and tweaking it ever so slightly.

Someone mentioned before--these are the masters being used for the 3D conversion. I wonder therefore if the extra brightness boost is not actually an attempt to fix anything but merely compensating for the dulling quality of the polarized 3D glasses. Michael Bay did this already with TF3--he boosted the brightness of the master so that when audiences saw it in 3D it would have the same luminance as a regular 2D print. I mean, even TPM is way brighter, slightly unnaturally so in some shots, and it never had any of the dullness and black crushing issues of the OT.