Think you know everything about Windows Phone 8? Watch this video, then get back to us.

In this 18-minute long clip, Joe Belfiore gives some tantalizing details that were glossed over during the presentation. That includes a first look at the Windows 7 syncing client for WP8 devices, the Xbox Music app, the new lock screen, cloud syncing in SkyDrive and Office with Windows 8, and more.

It is definitely worth a watch if you want to learn about the intricacies of using Windows Phone 8, so check it out above.