This book constitutes the refereed proceedings of the 6th Iberoamerican Conference on Applications and Usability of Interactive Television, jAUTI 2017, in Aveiro, Portugal, in October 2017. The 11 full papers presented together with one invited talk paper were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on Design and Evaluation of IDTV Services and Content; IDTV Content Recommendation; Omnidirectional Video and Video Repositories; IDTV Interaction Techniques and Accessibility.