To access the Video Editor, you can go two ways:
- In the Upload page, on the right side options.
- In the Video Manager page, select a video, go to the Enhancements page, and in the bottom right side, you'll see the "Try the YouTube Video Editor" link.
Here's an overview of what you'll find:
- Project/New Project
- Search videos (previously uploaded to your video manager)
- Creative Commons Videos
Watch this video for a quick demonstration of the editor.