Here is a YouTube playlist containing video tutorials from Steinberg for Cubase 7. Contents include:
Note that if you just let the videos play, the player will automatically skip to the next video in the playlist in the order detailed above. If you want to skip to a specific video, click the Playlist button at the bottom of the player (see picture below). Alternatively, you can click the YouTube button at the bottom of the player to open the playlist at youtube.com.