most (not all, some contributions are QTVR-only due to historical reasons)
many, but depends on photographer's choice of file upload (newer event = more likely to work) and your device's capabilities. You may experience slow playback, distorted images or unexpected browser quitting if there is only limited memory/GPU power available.
My exact hour for the Wrinkle in Time, was supposed to be 04:08 Am :-(
Not too much to shoot around this hour of night ... sorry, I mean ... morning :-)
So I was thinking where to go and capture something really special at this moment ...
And there is this new supermarket just close to my house, that opens up everyday at 07 AM ...
And there we went, me and my wife, without any kind of authorization :-)
So around the perfect time, my wife Andréa, that works with me as my assistant and sound recorder too was using a recorder inside her clothes. She went to the cashier to spend some minutes and exactly at 08:08 AM she told me to click and I got my camera out of my backpack and begun to turn around shooting her at all sides of me, so when the security guys came to me ... I just said that I was shooting HER as a souvenir and that they could check at their video surveillance cameras what I was doing.
The point is that after each click wiht her on image she would walk to another position, but I was shooting some more clicks whitout her in the picture :-)
Anyway, she's there just in one position to make a nice composition for our QTVR.