While the paint may have added to the effect (and the yellow part of the flame), the missing half of each rim was a huge part of the flame. The color of most of the flame, white, is the same color as magnesium burning.
Still not so sure I agree with your assessment.
I just looked at the video, and the only time you see flames is when the plane runs over the white striped lines.
The pilot landed to the left of the centerline, and no flames can be observed until he hits the first white paint line. Flames shot out when he crossed 8 or 9 lines. When the plane drifted right of centerline, all you see are a shower of sparks coming from the front nose gear, no flames whatso ever.
If it was the magnesium burning, then it should have still continued to flame???
I just wonder, what is the main composite of centerline paint, since there is reflective material in it.