  We present Hanstreamer, a free and open-source system for webcam-based data
presentation. The system performs real-time gesture recognition on the user's
webcam video stream to provide interactive data visuals. Apart from the
standard chart and map visuals, Hanstreamer is the first such video data
presentation system to support network visualisation and interactive
DimpVis-style time-series data exploration. The system is ready for use with
popular online meeting software such as Zoom and Microsoft Teams.
