I was not along in being impressed by this service – but since it made use of HTML 5 and the videos were encoded in MP4 format the video display would only work in a limited number of browsers, including Google Chrome. Many users who do not have access to such browsers will not be able to see how this service works and try out for themselves features such as searching the Twitter stream and having the video jump directly to the appropriate point.
So if you use Opera or Internet Explorer you can, for example, visit the page about Paul Boag’s talk and search for what he had to say about ‘legacy’ Web sites.
The rapid development we have seen with Martin’s service illustrates the benefits of a ‘just-in-time’ approach to accessibility which myself, Sarah Lewthwaite and David Sloan described in a paper on “Developing countries; developing experiences: approaches to accessibility for the Real World“. If the videos had not been made available due to concerns regarding the costs of providing captioning in order to conform with WCAG accessibility guidelines we would not have been in a position to exploit the rapid developments we are currently seeing across the Web development community, including this example of exploiting the Twitter stream – which, again, we needed to archive in order to provide the content for this just-in-time solution.