We found these promos of Significant Others. The first one is a Fox special promo with Liz, Jennifer Garner and another actress of the show. The other videos are promos with scenes from it.
Significant Others’ 6 episodes are available on DVD
You can watch the clips with Liz in the video archive
PS: in the 2nd video there’s Matthew Fox… haha!
Elizabeth Mitchell - Projects - Significant Others - Video