Dictionaries and Encyclopedias can give good overviews when starting a global dance topic. Though some of these look like they are focused just on music, often discussions of music and dance are combined. Browse by the country of origin of your dance type or try searching for the specific dance. You can use the bibliographies of these entries for "next step" resources. Search them in Primo or order through ILL or MeLCat.
Consider different ways you may need to search for your dance
YouTube and other freemium platforms have a lot of great global content, but the library also has streaming content for global dance.
This platform allows you to log in and create shorter clips from their videos. While you can't embed these in slides like YouTube, you can embed the link in your presentation and just jump over to the database when you want to show it.