Watch a video walkthrough here.
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The walkthrough shows landing on the Thor movie page also brings up a column on the right side that shows related content such as “Earth”, “Fantasy World”, and “Natalie Portman”, and clicking on those icons can bring up more choices in that category. Perhaps knowing that a Natalie Portman search can swallow up a whole afternoon, the app-makers have designated the Start button as your saving grace. Hit Start and your entire search history is displayed, allowing you to easily jump back to your original page. After downloading the app, the Video Unlimited preview function can be found under the XMB’s Video icon.
Source: PlayStation Blog