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.
I try to translate my vision of time: In French, time also means weather and you can see those two in the background, 24 hours over Paris each 1/2 hour. Time is also a rotation and that means the time it is. Finally, the third movement of Summer from Vivaldi for the music and its "no age value!"
It was very simple in my head, but when I was on the roof of my building, I understood it will be quite impossible because the wind and the ground were not stable.
I was no more disappointed with a great idea in my head: in France there is a great musical feast for Summer Day and I will work for a panorama of a great orchestra playing at the Opéra or at Le Louvre... Nothing for the first one and ballets in the second :-(
That's why I stay with my clock ;-)
I have TIME to realize my desire and will show you better the next time ;-)
(Sorry for my English! For the first time you will probably have a correct translation in the websites doing it!!!)