I was sent a link by B2B Marketing for an interesting and relevant whitepaper, " YouTube: Best Practices for the B2B Marketer ", that originated from Google.
Although it is effectively a bit of 'self promotion', the advise that it contains about creating and sharing video content is relevant and thought provoking for any company considering using YouTube as part of their communication strategy.
Furthermore, the underlying principles of good content creation, regular uploads (tweets/updates/comments), cross promotion, tracking and analysis etc. etc. etc. are all equally relevant to Twitter and Facebook.