Apple has labeled the area "Song + Video Together".  The following is taken from the iTunes Music Store:

"With this special offer, iTunes brings you both components of the music you love (audio and video) in just one click.  It's an easy way to make sure you're up to date on all the latest music while also grabbing videos for your iPod.  You can choose to get tracks and videos individually, or you can get any of the tracks listed below - and its video - for just $2.49.  A  complete package at a great price."