To search for dance videos in the catalog, it is easiest to use the advanced search option.
To just search DVDs, change the location to Media DVD. There is also an option for VHS, if that format is available.
Use the subject line to search for dance. This will pull a list of all the dance videos in the collection.
To search in that collection, add keywords in the words or phrase box at the top, or the title in the title box below it. This searches for genre, topics, and titles, within the dance video collection.