Princess Kate has confirmed that she has completed her chemotherapy treatment in an emotional new video message. Prince William, Prince George, Princess Charlotte and Prince Louis all feature in the video alongside the Princess of Wales. Kate and William can be seen playing with their children in the woods, on the beach and in the sea during the emotional video as the princess provides an update on her cancer battle. The Princess of Wales confirmed that she will return to work soon and is planning to undertake several engagements between now and the end of the year. Kate also outlined that her…