The video link is sometimes at the bottom of the result's link.
Click the phrase under "Links," such as "Part of the Films on Demand collection."
Use just one general subject. Examples: Sleep, or College students.
There are only about 100,000 videos, so use just one search term instead of narrowing your search with multiple search terms like you would with articles.
If you get no results, click New Search or Clear, then enter a simple search again.