[HELP] seeking paid filter to remove purple fringing in old videos

[Selur]

a. The whole clip has too much red in it.
b. that clip was badly resized and deinterlaced
c. chroma is shifted in some scenes

Minimize luma (Y) channel processing as much as possible, and avoid noticeable detail loss.

+

the test source has been badly upscaled (not by me – I received it this way). You are free to downscale it if necessary

those two contradict each other
I doubt that removing these chroma aberrations in this clip will also remove them in the original source.

=> is that the source you want to improve, or do you want to improve a version that is less processed?