The Windows Phone for Windows syncing tool has been updated for Windows 8 and Windows RT. With this update, you'll now be able to add playlists and ringtones to your Windows Phone 8 and watch the videos you've taken with your Windows Phone. Windows Phone for Windows lets sync your music, photos, and videos from your computer to your device and much more.
You can download the update directly on your Windows 8 or Windows RT device through the Windows Store or by using the following link.