If you have credits and click on any video link, 3 credits will be charged from your account if you watch the video more than 29 seconds. If you discontinue watching (pausing the video, or exiting the profile) before 29 seconds, there will be no reduction of credits.

If you currently have no credits on your account, you may watch a 30 second preview before being taken to the purchase credits page.

There you must purchase credits to view the video in its entirety.