Go check by the Download page, under the Source Engine Maps. I wonder why the images aren’t loading, though. The map is made for TF2 Machinimas, so it also works with Source Filmmaker. That’s only if you fixed the Gorge Textures for SFM using the Python script.
Checking by the description of the download, you can see that there’s an Untitled Unannounced Machinima upcoming. What’s that? You’ll just have to see.