This article introduces an “Inquiry Graphics” (IG) approach for multimodal, Peircean semiotic video analysis and coding. It builds on Charles Sanders Peirce’s core triadic interpretation of sign meaning-making. Multimodal methods offer analytical frameworks, templates and software to analyse video data. However, multimodal video analysis has been scarcely linked to semiotics in/of education (edusemiotics), for the purpose of exploring higher education teaching-learning and settings. This article addresses the mentioned gap by introducing the IG approach, which links multimodality and edusemiotics primarily via Peirce’s triadic sign. The article offers a step-by-step IG coding guide, examples and explanations. IG application can be expanded to video analysis across many fields, levels and subjects, within and beyond higher education research, nationally and internationally.