I will try the VLC preview first of that helps. but @Lurch the Drift Ghost S doesn't produce a raw file?
If its ok in VLC then it's your editor, also make sure you have high bitrate enabled. RAW for video would produce huge files! Each frame would be 12meg
Great news, RESOLVED, thank you Thunderous, yes it needed HIgh Bit Rate enabled and now it no longer deinterlaces or looks blocky (if blocky is a word!)