You're right! They added 7 tracks to the selection playlist too.
https://www.youtube.com/playlist?lis...q6QRhEmjIw9Fr9
Because of the weird way they announced this, Japanese fans seem to have a bit of a theory about why they chose the dates/times they did...
Seems that 04/08 and 10/02 are on the table with the former making more sense than the other. The "what will you see?" had them speculating and there is an 04/08 seen from top to bottom in the image but then there's also a 10/2 looking from bottom to top but I think that's a stretch.
In any case, neither of the things like Ohia PV or the Dreamed a Dream thing had to do with the times so this is probably why they think it's a hint to something else.