Rock House Instructor David Ellefson is featured on Bass Player Live TV. In the approximately 30 minute video (split into 9 parts) David talks about his heavy metal style of playing, demonstrates and shows several of his favorite riffs and some of the common ones. He also does a question and answer session. I found the video to be interesting and informative.
If you're a bass player and looking to find some tips you will definitely want to check this out.
Link: Bass Player Live