TORONTO — Amazon Prime Video customers in Canada can now set up a social viewing experience with friends and family with the new Prime Video Watch Party, a new desktop-viewing feature which is available at no additional cost to their Prime membership. Launched Monday, Prime Video Watch Party allows up to 100 participants (each must have a Prime membership) to join a watch party for a TV show or film. Watch Party provides synchronized playback which the host controls, and an interactive chat feature for participants to communicate. Customers will be able to choose from thousands of titles available in...