Personally I'll only ever allow flash to load and watch a video if a product page has sufficiently grabbed my attention first. Doubly so if I'm at work.

They should focus more on the real time nature of the updates and why I should care if my ipad gets a update in real time when I make an change on my iphone. I'm sure there's some scenarios where real time is useful and even more so once they start supporting more platforms but users are unlikely to try and come up with these scenarios for long before they move along to something else.

Video is great, but as an expansion on a brief introduction.

I for one would prefer to at least read a couple of sentences that tell me what an app/service does before I have to watch a video, especially if I'm mobile at the time and/or it's hosted on Vimeo (great quality but looooong unforgiving buffer times in the UK)

Assuming they are able and care to view that video. Why not both?