Defining Web 2.0 (Videos): Three Different Definitions

I was dong a little research on YouTube and found a few videos I thought I would share.

1. This video is a short clip (50 seconds) of Tim O'Reilly "defining" Web 2.0. O'Reilly, as with everything else I have read by him, approaches a Web 2.0 definition from a business process perspective.

2. This clip (5:17) takes the information from the Wikipedia entry for Web 2.0 and presents it in video format. Nothing earth shattering, but for those of you who prefer the movie over the book, this is for you.

3. The final clip (3:00), which I found to be the most enlightening, is from Andi Gutmans, co-founder of Zend. Gutmans approaches a definition of Web 2.0 from more of a technical standpoint. His main Web 2.0 attributes are:
1. Rich Internet Applications (RIA)
-Flash
-Ajax
2. Service Oriented Architecture (SOA)
-Feeds
-RSS
-Web Services
-Mash-Ups
3. Social Web
-Tagging
-Wiki
-Blogging
-Podcasting