YouTube has launched YouTube Video Editor which enables users to edit videos after uploading it on YouTube. If you uploaded a video on YouTube and then you think that it is bit longer then you can short your video by editing it over there itself. By using this editor, you can merge multiple videos, customize the opening and end of the video by adding special instructions, promotional links, titles etc. You can also add soundtrack to your video from YouTube’s list of soundtrack to make your video more interesting.
Here is a video showing how to use “YouTube Video Editor” online to optimize and enhance your already uploaded videos.