Some how they are not visible in that video, but they are there. Unless somebody tell me how to get rid of them.
My understanding is that VK1 and VK2 in 2x2 mode display in PAL/NTSC but skip every other line so the vertical resolution is around 100 lines. VK2 in 2x1 mode is all PAL/NTSC lines so it's around 200 lines, but like all PAL/NTSC non interlace modes on a decent monitor you see the scanlines where the extra interlaced lines would go.
So it depends on what you mean by raster lines being visible.
Have you switched to 2x1 mode?