There is provided with a digital content playback apparatus which generates new digital content by replacing a content part in digital content by an other content parts, including: a storage to store license conditions defined for the content parts in the digital content, each of which includes at least a replacement permission condition and a replacement target specification condition, a specifying unit configured to allow a user to specify a replacement source content part as a content part to be replaced, and a replacement target content part as a content part for adding to the digital content for replacing the replacement source content part, and a verifying unit to verify whether license conditions of content parts in the digital content and the replacement target content part would be satisfied when replacing the replacement source content part in the digital content by the replacement target content part.