most (not all, some contributions are QTVR-only due to historical reasons)
Javascript + HTML5 / WebGL
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.
The main causeway at Angkor Wat is the place for the classic photo momento. Always busy, always a delight to the senses, weather conditions prevailed and produced a rainbow over the main towers not only on the 21 June but also on the 22 June 2004.