Use the Advanced Search interface in LibrarySearch to limit the material type to "Audio & Video." You can also limit the search scope only to "UO Libraries" if you only want to search what we have here at UO. You can search for a particular choreographer or director by labeling them as "author" in the search field.
When you see your search results, you will also see facets on the left side of the page that will indicate how many results there are for specific audio and video formats. You can click on these facets to see only the results for that format. For example, to see only DVDs, click the "DVD Videos" facet.