YouTube Annotations and Google Webmaster Tools
If you’re having trouble getting your associated website to show up in the Annotations area of YouTube, try these options. Helpful links:
Help file: https://support.google.com/youtube/answer/2887282?hl=en
Video: https://www.youtube.com/watch?v=P-2M5p5lk_w&list=UUl7KFF4s8_SwcKNJrYyReww
Blog with YouTube marketing suggestions: http://innerspacemarketing.com/video-marketing/link-your-youtube-channel-to-your-website/