oEmbed Provider Whitelist and wordpress.com

So, I plan to follow the instructions at a previous thread (http://ww.wp.xz.cn/support/topic/oembed-internal-whitelist) to add my employer’s site as a oEmbed-capable media site, but I have a quick question: does the change to the ww.wp.xz.cn whitelist “cascade” to the wordpress.com whitelist? Do I need to contact someone there to get the site whitelisted for embedding? Is the short code plugin process necessary to get embedding clearance for wordpress.com sites?

Thanks for any advice,
Francis