How do I delete a video?
If you own a video (or article, slideshow, list, etc.) that you would like to delete, just go to your Channel page. Under 'My Channels' click on the Channel which contains your video. Then click 'Media' on the left panel.
You will see thumbnails for all of your uploaded content. Click 'Delete' next to the video you wish to delete.
That's it... it's gone!