The third team talk was presented by Paul Donnelly and Nagesh Susarla. They go over how to start your query out in the YQL console, access YQL data via the various endpoints, and go through YQL’s various authentication layers.
The second YQL talk at YUIConf was presented by Nagesh Susarla. Nagesh goes over how to use YQL execute in the open data tables. Here is the link to the original yuiblog post and below an embedded video.