By default Wordpress allows the user to leave a web address when they post a comment. It’s this web address many spammers use to create inbound links to their websites.
Tips & Tricks
How to get Copyright Permission to use a song on YouTube
Sometimes a client will ask for a well-known song to be included in their work, often to be viewed worldwide and appear on Youtube. In order to play recorded music in public, legal permission is needed from the copyright holders. A music licence gives you this permission. I knew from previous experience that obtaining a music license for a small DVD run could be obtained through PPluk.com.