When you type a query searching for a file or a video Webeaver.com search processor will optimize your query in order to give you the accurate results...
When your query contains a file extension, the search processor will detect the most popular extensions and switch automatically into the advanced search mode retrieving only files that have the detected extension.
The same method is applied when a file version is included in user query. Webeaver.com index may contains many versions of the same file so users can profit from this feature and include a version number in their queries, the search processor will detect the version number and switch automatically into the advanced search mode to retrieve the appropriate file with the specified version number.
Please feel free to click on the Advanced Search link in Webeaver.com search results page to open the form that let you specify more query criterias for a better search.