Method, device, and non-transitory computer-readable recording medium for supporting relay broadcast

A device for supporting a relay broadcast, comprising:

• a data acquisition unit configured to acquire real-time data containing videos or audios captured or recorded in real time by at least one device, and acquire non-real-time data containing pre-stored videos or audios;
• a relay broadcast content editing unit configured to, according to an editing input from a user, extract processed non-real-time data of the same format as the real-time data from the non-real-time data, and generate metadata related to editing of a relay broadcast content containing the real-time data and the processed non-real-time data;
• and
• a relay broadcast content transmission unit configured to transmit the real-time data and the processed non-real-time data contained in the relay broadcast content and the metadata to another device or an external server.