Therefore, here are additional information for those who use of Europe from Netflix (eg via Unblock_Us): The Chromecast does not use the DNS server that it is allocated by DHCP from the router, but rather has the Google DNS servers 8.8.8.8 and 8.8.4.4 invariably fixed. This means that the remote-controlled android device can indeed achieve Netflix and Chromecast transmits the playback instruction, the latter this but then refused.
With all kinds of pull-ups, it can then ultimately then but but make only if you have a router, on which one can implement a redirect DNS requests of Chromecast the desired alternative DNS server via iptables. So it must be, for example DD-WRT, Tomato or Freetz.