A device, system and method for real-time personalization of streaming video is provided. The device has access to a memory storing: nonpersonalized video segments; and data for rendering personalized video segments, the nonpersonalized video segments and the personalized video segments associated with a given order. When a request for a personalized video is received, the device causes rendering of at least a subset of the personalized video segments to be rendered using the data, incorporating personal data associated with the request into the personalized video segments. As the personalized video segments are rendered, the device updates and transmits a manifest, to the communication device, identifying available video segments according to the given order. The video segments identified in the manifest are provided to the communication device in response to receiving requests for the video segments.