You can use the video type search or/& use the general (Any Type) search but filter the results after they've come in by clicking on the movie filter in the far top-left box of the search results. Clicking on this filter will show only movie files.

Also some things you should see here: 1. Movie download issues, 2. autogenerated spam results, & for search & downld hints see 3. How to use Bitzi Web Lookup ... & How to use Magnet Links & Direct Connect, & 4. To continue files downlding (click on link)