Read the outdated SEO coding theory debate thread that PTC linked to.
Whether the video is good or a good example of a viral video doesn't have anything to do with the quality of the advice he is giving out.
In terms of onpage SEO the information is pretty good. Where it's lacking is the importance of links, which is a pretty big piece of the puzzle. In saying that, the video is titled design/coding so the content is relevant.
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