First off, the more data that Salesforce controls, the better they have locked in their customers... Or the more customers they have. I pity anyone who uses Salesforce and decides to leave for greener pastures. It would be a bloody nightmare.
The second clip talks about using social networking to learn more about their customers and increase retention. Not that mystical.
The third throws some buzzwords, sure, but it also warns people that not everything that's called a 'cloud' is actually a 'cloud'. In other words, some services behave like you expect 'cloud' services to (insane uptime and rendundancy) and others don't.