I just checked out your clip in post 2 and wow, very impressive indeed! The grain looks great, nice and organic, and the detail you've managed to extract from the shadows is very impressive, well done!

The screencaps looked good but in motion what you've done looks even better! I thought at first you might have the blacks a little too bright, especially the bit with the predator at the beginning, but once you get used to it it works really well and fits with the rest of the clip. I didn't notice where you'd added the SD footage either so it must have been pretty seamless, great job there as well.