Hhm, as you may know, OnlineVideos is a collection of centrally managed SiteUtils that control how the individual websites are called. The MP2 team is not managing that but the OV implementation updates itself periodically to gather updated SiteUtils.
Since the German channels are working, I suspect that the current Netflix implementation requires an overwork. However, I am not an expert and am not using Netflix myself. If you look into the administration section of the various sites you should be able to see if issues have been reported (yellow) or even confirmed (red).