YouTube has added a suggest feature to its video search similar to the Google Suggest at Google Labs.

An excerpt from Google OS Blog

The feature is enabled by default, but you can disable it in the "Settings". For now, YouTube Suggest seems to be live only for international sites like YouTube UK and only if you search from the homepage, but it should be available at YouTube's main site in the near future.

Expecting research at its parent to contribute to the search function at YouTube is obvious. But what YouTube does well is use the data on how its users navigate the site to come out with better techniques.

An excerpt from Softpedia

"Our algorithms use a wide range of information to predict the queries users are most likely to want to see. For example, Google Suggest uses data about the overall popularity of various searches to help rank the refinements it offers," Google explains in a FAQ published on the Google Suggest page. "By suggesting more refined searches up front, Google Suggest can make your searches more convenient and efficient by keeping you from having to reformulate your query. Google Suggest might offer suggestions that you will find novel or intriguing."