In France, the diffusion of the concept of intangible cultural heritage followed two simultaneous paths. A ‘top-down’ movement for the implementation of the Unesco Convention (2003) by the French Ministry of Culture, by means of the creation of an inventory and the mobilisation of the techniques hitherto used for the ethnological heritage. Considered as a lever by communities of practitioners, the convention has also generated a ‘bottom-up’ movement: nominations for the Unesco lists, participation in inventories… Each of these movements has allowed for the establishment of a renewed dialogue between the State, communities and associations and actors of all kinds. Since the issues of transmission and safeguarding (and therefore action) are central to the Convention, what is the nature of this dialogue today? What are its frameworks? For what emerging results? At the crossroads of these two movements and on the basis of the experience led by the Inoc Aquitaine ethnopole, shared with the Département du pilotage de la recherche et de la politique scientifique (DPRPS) at the Ministry of Culture and various ICH actors in France, this contribution focuses on the digital strategies deployed and at the place of the devices produced in the heritage chain at the crossroads of research and action; between inventory and arts and cultural education; appropriation of resources by artists and field actors, and appropriation of the collaborative functions of these media by individuals and communities.