This Common Craft video explains how live digital imagery is augmented with content from the Internet. The video shows two examples of how a smartphone can be used to access and view a ‘layer’ of additional content on the smartphone screen. The last example shows how the image from a computer camera can be augmented with a ‘layer’ of content added to the image.

http://www.commoncraft.com/augmented-reality-video

Junaio is an augmented reality browser that provides augmented content as well as allowing users to add layers of content that can be shared with others through social networks as seen in this video.

http://www.youtube.com/watch?v=2_fYcdH2nMY

This video shows how an augmented reality advertisement for a magazine is created. It provides good insight to the process and how it works, especially if you want to show complex content such as interactive 3D images. Notice how the user can rotate the paper and the content rotates as well.

http://www.youtube.com/watch?v=HTYeuo6pIjY&feature=related