In order to use this plugin you must register with the Kaltura website. It is true that Kaltura will host and provide bandwidth for your videos for free, but that is limited to 10GB (as of this date). Since you apparently cannot host your own videos with the plugin (using your own server, CDN, bandwidth, etc.), eventually you are apparently forced to pay Kaltura hosting/bandwidth fees by upgrading your account if you want to use more than their 10GB free limit. (10GB will be used up very quickly if you are hosting many videos and have many readers of your blog.) When you click the upgrade account button on their site, you are asked to provide your name and phone number to get information on how much it will cost. They don't list a pricing structure. I'm ditching this plugin because it is too controlling and limited, and Kaltura has not been transparent, IMHO.