Hi, AmandaEve.
That depends. If you want to post for two specific hours (i.e., between 7:00 and 9:00 on August 22, 2016 in your timezone), then, the [timed-content-server] shortcode will work perfectly. As for changing the Category, you could try hooking into the timed_content_server_hide action, and changing the category if the current time is later than the time in the hide attribute of your shortcode (both post ID and the hide date/time are available to you in your hooked function). Note that this will require writing your own PHP function to hook into the action. There are more details on the actions on the “Other Notes” tab on the plugin page.
