In all the sources I read, the entirety of the January footage had no hairworks enabled. tbh before this youtuber party, i think i'd only seen it in Nvidia previews and the 35min demo. Which source stated that it was only a section of the Januray footage that had no hairworks?
NO. Ok. Let me show you something
Watch to this. https://www.youtube.com/watch?v=sil3QCDJACU#t=7m01s Do you see Geralt's hair? Almost every fringe of hair is moving. Watch the rest after this: https://www.youtube.com/watch?v=sil3QCDJACU#t=7m45s
When Geralt walking and climbing stairs his hair moving fantastic.
Then watch to this(January). https://www.youtube.com/watch?v=sil3QCDJACU#t=5m07s Griffin hair actually moving. But here (youtuber's build) https://www.youtube.com/watch?t=902&v=dlVX4DpbFNc#t=14m54s the Griffin hair is static.
So this means that in January Footage hairwork was enabled. Except the bathroom footage. You can see the difference yourself between white orchard and bathroom footage hair.
Then in 35 min demo Geralt's hair moved totally different. There was hairwork enabled in Griffin head. May be not in Geralt's hair or may be in Geral's hair too but differently. I do not know. But the January one was the best hair.
And watch what hairwork looks like now in youtuber's video. This is link. https://www.youtube.com/watch?v=lJpWBMH9EtQ#t=0m33s
Note: In some youtubers' footage hairwork was enabled and in some was disabled
Compare this (January) https://www.youtube.com/watch?v=sil3QCDJACU#6m36s
To this.(youtuber's build) https://www.youtube.com/watch?v=lJpWBMH9EtQ#t=30m31s
Same places, Do you see how the hair was moved beautiful, shaders was amazing in January build? In youtuber's build hair is so simple.
So it means that in January build hairwork was enabled and was beautiful.