Systems and methods for customized live-streaming commentary

A method for transmitting a plurality of fingerprints that have been autonomously identified from a broadcast stream such that an alternative media stream can be synchronized across multiple receivers of the broadcast stream, the method comprising:

• receiving, at a broadcast server, a broadcast stream containing audiovisual data;
• receiving, at the broadcast server, an alternative media stream to be associated with the broadcast stream;
• receiving, at the broadcast server, time information of the audiovisual data from a common time source that is independent of the broadcast server;
• determining the plurality of fingerprints associated with the broadcast stream that will be used to synchronize the alternative media stream with the broadcast stream based at least upon the content of the broadcast stream, the time information, and the alternative media stream, each of the plurality of fingerprints corresponding to a fixed time point in the content of the broadcast stream;
• and
• transmitting the plurality of fingerprints to one or more recipients to facilitate playback of the alternative media stream in synchronization with the broadcast stream.