Intel’s OTC has released code and binaries for the video sharing use case demo online on the webscreens github project:
(edit 16.6.2014, URL updated) http://webscreens.github.io/demo/
This demonstration provides an example of the video sharing use case that is listed as one of the important use cases for Presentation API. It is similar to the demo that was shown during the the W3C TPAC Session.
Using the binaries from the page, or building your own version of Chromium with the provided patches applied, you can get an impression of what using Presentation API might look like and the sort of new usage scenarios that it enables. It’s also possible to experiment and build your own examples.
More details can be found on the demo page.