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.
Alight at Night
More than 250,000 lights adorn the heritage buildings, trees and fences of Upper Canada Village creating a one-of-a-kind magical backdrop for its annual Alight at Night festival.