Web 2.0 is the second generation of websites. It not only show and give the content, but more than that. With web 2.0 now the users can do more interaction with them. The example of the 2nd generation of the website technology is the social network sites.
Videos are becoming such important tools for teachers, but one thing that stops many of us from using videos is making them: With all the other things we have to do, there's very little time to find the right video creation tool, learn how to use it, then actually create the videos.