Instant Videos are videos automatically generated for you from RSS feeds. RSS feeds are blog rolls that are updated whenever a new post is published on a blog or publication.
You'll receive an email when a new video is available for you to use. If you find that these emails are coming too often, you can adjust the frequency on your Account Settings page under the Email Notifications section.
If you find that the Instant Videos are not using the right content source or feel irrelevant, you can enable or disable some of your RSS feeds.