Quick Reminder,
If you need to convert your videos into a good working DNxHD format wraped inside .Mov container to work inside Cubase or Nuendo you can download the ER Media ToolKit for free and use the DNxER app that will also allow you to quickly resize the video, separate the audio from the video if need be and even replace the audio. ( BTW, the DNxER app already supports creation of DNxHD inside .MXF container as well as MOV but note that our video engine not yet compatible with MXF video streaming -Sep_2018-)