We have made some screen-capture videos demonstrating various concepts in TYPO3. For now we have no more than these files available but hope to provide more of them in the future as a great way to learn concepts of TYPO3.
About the Extension Manager watch these videos:
About upgrading from TYPO3 3.0 to 3.5 (new EM architecture) watch this:
The videos are zipped WMF-files. Sorry, unix users.
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