[franketto]

Ok, now I see some hope to restore it.

But the first approach doesn't work for all the clip, as from some frames on, it has this repeating pattern:
(Assuming r=reddish frame, y=yellowish frame)
ryrrryryyyryrrry

So the result of mergechroma at some point is 2r8y frames.

Also the second approach with colourlike has the same problem of 1y4r frames.

The ideal should be analyze each field and determine if hue is in range yellowish --> correct the hue, else is reddish --> so correct in other way, then interleave.

EDIT: maybe I must tweak a bit more the colourlike settings, but I'm no expert at all in this hue thing... is there some tut/guide to correct yellowish/reddish?
EDIT2: corrected pattern