I wonder if they have an automation system which releases these perfectly in time with the video, or if they have some blog boy that has to post them at the right time.

A manual operation wouldn't shock me at all. A friend used to work on Apple.com and as recently as 5 years ago the product pages were still hard coded. No CMS.

They have multiple fake product "labs" with which to use as sets simply for filming these videos. I am sure one or two FTEs is plausible.