When field based content is viewed on a progressive display both sets of fields are visible resulting in combing (also called tooth-combing) artifacts.
The most likely cause of this is interlaced content has been incorrectly flagged as progressive. This means that our system has not performed a necessary deinterlace on the content as it has gone through our encoding pipeline.
Review the field order that has been flagged in the files header information. If there is a discrepancy you may need to re-transcode or deinterlace depending on whether you are delivery MPEG2 or ProRes file.