Warning: this post is entirely conjectural and may have no basis in fact.
There is an interesting post by Loren Baker that encourages companies to develop video websites promoting their brands. Their existence can be flagged by putting them on.TV domains. He suggests that one should Take Advantage of .TV Domains for SEO and Reputation Management
There is a very large untapped market of creating .TV niche and business oriented online video sites which your business may be overlooking in your online marketing and search engine optimization strategy. If your business has a strong brand, then people are searching for your brand online.
One way to attract that same user who is searching for your brand, and build the value of your brand in search results, is by launching a .TV site which is an online video representation of your company. By doing so, not only will you have another authority and valued site which should rank highly for your domain name, but you will also be engaging your customers in a form of social media.
He points out that this will ensure that companies are more visible in Google universal searches. In any such search there will probably be a video within the first half dozen items. If an image is associated with the brand, this image may also be referenced. News items may also be included if the company is making news.
Having multiple online files associated with the company or brand clearly makes the company more visible in such searches. An intriguing question is whether these multiple online properties have any synergistic effect in the regular Google keyword search algorithm. Google has been very clear on the importance of hyperlinks in confirming the authority of web pages. Most other facts about the algorithm are carefully kept confidential.
How important are images in the Google search algorithm?
A commonly held view is that images in a web page give zero information to the search robots. It is emphasized that one should use Alt attributes to provide information on the subject of each image. Nevertheless Google is trying to extract more information from images. This can be seen in the Google image search that can now be done to find faces.
Given these developments, it is reasonable to infer that perhaps an image in a web page may be assessed for its contribution to the relevance of the page. If there is an associated video file, perhaps this could also contribute to the relevance of a given web page. If this view is correct, then any given web page may pick up contributions to its relevance from other associated video or image files. This would encourage the creation of such associated picture files to improve the search visibility of a given web page.
It must be emphasized that this is all conjecture. However nothing has been lost if the conjecture is untrue. Creating associated images or video files may in any case contribute to the visibility and ranking in Google’s universal search listings.