The video provides an overview of Heat Map widget, which displays a combination of colored rectangles that help users to view the state of several variables all at once. After explaining how the Heat Map works, the video proceeds with describing how to build such widget in document editor starting with adding dataset, through adding widget from content option and finally defining elements to be included into Heat Map (this widget requires at least two attributes and two metrics). Tutorial mentions also additional options and interactive menu, which allow users to control more things about the display of this widget.
