I was a bit confused the first time I saw this rating interface, and have to admit that I ignored it for months. The thing that threw me was the multiple checkboxes offered for each value. But I came back and realized that what this was doing was giving you a pre-defined set of tags which it was then using to create a filtering mechanism for the site. I appreciate that. I think it could be streamlined a bit by implementing those checkboxes differently.

1. User must click the Rating button in the lower right of the video player.
2. The rating panel expands and shows rating options as text values.
3. User may click 3 values, and may click one value 3 times if they wish.
4. Ratings are displayed as a cloud.
5. The talks list allows users to filter videos using the ratings.