Well, see the sequential Tv signal was sent back to earth in its raw form, that is one field of red, one of green, and one of blue, one after the other. These were then put through a matrixer which combined the three seperate colors, by storing the two previous fields while the third came in live. So, say red was coming in live, the disc buffer would combine it with the previous green and blue fields. This then, created a full color image using three not quite aligned seperate color fields from the sequential Tv signal. If this was then slowed down, as the HB camp like to claim, this sequence would be slowed down as well. Say the signal was slowed down by half, then you would see the color artefacting last for two fields instead if one. (like the launch "confetti" video would have the same color streaks repeated over two fields, rather than one).
No HB can ever explain why that is not the case.