Okay, take these with a grain of salt. I only have some screenshots to work with, not source video. Also, my Hue change is based on the vectorscope.

I want to rationalize my Hue before you all complain. As I've said in the past, I don't like to adjust hue because I have color vision problems. My decision is because the brightest red and blue peaks are off of true red and blue by about -5. Similarly skintones are more towards magenta and off of "standard skin tones" by the same quantity.

If you don't like the hue change, disregard it. I also did NOT adjust the Levels. I feel they are fine and that the contrast issue is from washed out colors, not from a white/black problem.

Anyway, what I've done is use tweak's MaxSat setting this time around. The second tweak is so the hue adjustment moves ALL colors, not just those effected by the saturation increase.

In this case: tweak(MaxSat=60, Sat=1.3).tweak(Hue=-5)

What this means is any color in a given frame that already exceeds 60% of maximum valid levels is not adjusted.

SOooo, while a frame may have reds so strong it's hot (possibly invalid) in the original, all reds below 60% are still boosted (but not so far as to exceed valid levels). Reds ABOVE 60% are untouched.

I'm sure some futzing around could yield even better results, but I think it's the right direction.

Edit: Look at these again, I would consider using a lower saturation. Probably something more around 1.2 or 1.25.