Click on the link and scroll down until you see a link to WorldCat. WorldCat is a library catalog that includes not only Princeton's material, but thousands of other libraries as well (the catalog does specifically note materials that Princeton has, though.) Tips on searching WorldCat for video art appear if you click on the "i."
1. A good way of searching WorldCat is a subject search. Click on the "advanced search" tab, then click on the drop-down menu that says "Keyword" and select "Subject." Type in "Video art." (in quotations) and search.
2. Now you'll get a very long list of resources. You have a couple of options now. You can limit the results to a certain kind of material--by clicking on the "visual" tab at the top, you'll get only DVD and VHS resources. If you click "Books," you'll only get books on video art.
3. Or, you can click on the button at the top that says "Related Subjects." This will give you a list of the other subject headings that were common in the list of results. You can search any one that looks useful to you.
4. You could also try simply clicking on one of the results and looking at its record. The record will tell you the title, author/creator, and subject headings associated with the work. If the work is relevant to you, you could try clicking on the author or other subjects in order to find more resources that are similar.
5. Notice that the DVDs that come up in your subject search for "Video art" have the distributor's name in the "Publication" field. This could be someone like Facets Video, Editions a voir, or Films for the Humanities & Sciences. These are video distributors who produce video art, so you can also try an advanced search for one of them in the "Publisher" field.
5. Don't be afraid to play around in WorldCat. Some other subject searches you could try include "Art video" and "Experimental films." If you find a resource you want that's at Princeton, simply click the "Find it at PUL" link in the item's record to search Princeton's catalog.