Despite the widespread proliferation of social media in policy and politics, televised election debates are still a prominent form of large-scale public engagement between politicians and the electorate during election campaigns. Advanced visual interfaces can improve these important spaces of democratic engagement. In this paper, we present a user study in which a new hypervideo technology was compared with a publicly available interface for television replay. The results show that hypervideo navigation, coupled with interactive visualisations, improved sensemaking of televised political debates and promoted people's attitude to challenging personal assumptions. This finding suggests that hypervideo interfaces can play a substantial role i...