This exegesis looks at interactive, network based video through the development and use of experimental works. The works are described in terms of the concepts, techniques and theories explored and their implications for future works and theory. It documents the formal and technical experiments which were used to investigate the affordances of network based video for real time interaction, and tracks the development of vidgets as audio-visual tools and instruments as they increased in complexity and function, finally being specifically designed for use in live audiovisual (VJ) performances. It explains how ideas originating from the histories of sound art and systems based art as were used as frameworks for conceptualising and developing interactive screen based works. The term 'all-data' is devised as a means to describe both the network based digital environment which these new works inhabit and the expanded palette of digital signals which may be used and inco rporated into the works themselves. Through processes of action research and critical reflection, it identifies and explores a number of techniques and attributes which are common to interactive, network based video production as a practice and which may be used in a range of future projects.