This canvas demo allow to watch a whole day timelapse in a single image.
Once images loaded, draw freehand curve onto the picture.
Time is encoded as Y axis (bottom of the image is time to, top is to + 24h).
So drawing horizontal lines will result in no change time along X.
By drawing curves, time can be "compressed" along picture, or even reversed.
Press Ctrl+ to zoom.
Note: works better with Google Chrome.
Other timelapse pictures are taken from webcams.