Amazon Video Widget - with ads for books

Amazon has just added Video Widgets that allow you to upload your own videos and the insert small ads for Amazon products (books etc). The ad integration is quite interesting and not at all interruptive, imho.  Check out this video with 2 of my books and 2 other book as 'ads', below.  I think this is a perfect example of how advertising will (and can) provide free content - the viewer trades his attention for free content. Now, the next step would be the VIEWER picking the 'ads' (or rather, contverts) he wants to see.

Update: Amazon seems to have some tech problems here - the products don't always come up ;)