Here's a pretty nice video about Air China and the 747. Looks like something promotional that they did to celebrate the delivery of the 747-8, as it was posted around that date. I thought it was well done.
Interesting. I know that they had originally planned on launching to LAX, but when things didn't work out, they shifted their plans and that is why they have JFK now, and they announced SFO in May just yesterday as well.