Catherine Princess of Wales praised for cancer video a slick video by Katherine Princess of Wales announcing that her chemotherapy has finished marks a dramatic shift in Communications for the British royal family media and commentators said Tuesday Kate as she is widely known posted the 3-minute footage on social media on Tuesday some 6 months after she dramatically revealed in another video that she was being treated for the condition but the intimate portrait of the 42-year-old princess her husband Prince William and their young children was notable for its departure from the stiff formality of traditional Royal public relations it's groundbreaking an absolute first a tectonic shift in how the royal family controls its image said PR consultant Mark Borowski Kate's journey is profound and deeply personal but they've learned that emotion can be controlled and weaponized in small potent doses