Be sure your video is indexed prior to optimization. Performance on non-indexed videos can do as well as the indexed ones but will appear without a thumbnail. One recent video, BallenIsles Homes For Sale placed on page two and one for the two keywords chosen.
Keywords follow the same formula in video as for any other source inasmuch as the indexing is based upon these elements and not the video itself.
SEO in video is more successful because of diminished competition compared to that associated with organic search.
