У вашего броузера проблема в совместимости с HTML5
Topics Include:
-Simulating a shallow depth of field
-Creating and using an image map
-Painting with varying opacities
-The dynamics of cumulative painting
-Blending with opacity layering
-Repairing a missed spot
To see the full size 800x600 video, please visit http://www.blog.bluehourphoto.com/videolibrary/layermasks/.
It's free!