Given the fact that the thrust of the event is for amateur radio operators to establish two-way communications with the ships, it will likely be just radio-specific. However, there is no reason why the individuals and organizations that are participating could not be streaming audio or video of their activities during the event. Amateur radio communications are not protected with regard to privacy, so they can be re-transmitted. I don't know offhand if any of the ships/museums are planning on streaming during the event.
If you are really keen on listening and don't have access to radio equipment, but you do have Internet access, then you might consider using one of the online receivers that are available. Some generous individuals and organizations make computer-controlled receivers at various locations throughout the world available to anyone via Internet interfaces. Here are two sites that provide such access:
http://www.globaltuners.com/
http://www.websdr.org/
Note that many of the bands covered by the receivers on the websdr site are the same bands that will be used for the event. If you plan to use the online receivers, I would recommend setting up an account well in advance and getting accustomed to using the interface before the event as it may initially seem to be a bit overwhelming. You will have to adjust and tune the radio just like you would a real physical radio, and there are limitations in terms of what you can do and how long you are allowed to dominate a particular receiver.