Complex sentence: The first 30 seconds of the video will be shown at "The Ellen Degeneres Show" on December 3,2013; the full length video will be later uploaded to Spear's VEVO channel that same day.
Split into simpler sentences: The first 30 seconds of the video will be shown at "The Ellen Degeneres Show" on December 3,2013. The full length video will then be uploaded to Spear's VEVO channel that same day.