Can I remove my video after I upload it?
Yes. To remove a video, go to your profile page and then to "My Videos" to find the video that you want to remove and click the delete link for that video. If the video is not yet indexed, it is deleted from your account. If your video is indexed, it is removed from your account and it is removed from Yahoo! Video and will no longer be searchable on the site after the next index update.