Enable Full HD Video Recording
1080p video recording can be enabled in the advanced show settings.
Click on the name of the show on the left side of the dashboard and then click on "Show Settings" in the upper right hand corner of the page. Then click on "Advanced Show Settings" under the artwork. Make sure the option "Full HD Video (1080p)" is enabled.
This setting pertains to each different show you have so if your account has more than one show then you would need to enable this setting for all of the shows where you want to record 1080p video.
Please keep in mind that your camera will also need to support 1080p.