Audiovisual and mobile technologies seem to be full of promises for teacher training and professional development. Within the INDIRE project "Making Innovation Visible" we have therefore designed an "online video showcase" drawing on the heritage of innovative educational practices and knowledge gathered by the Avanguardie Educative project (www.avanguardieeducative.indire.it). We prototyped this video showcase in order to build a flexible tool that can guide the progression towards 21st century learning environments. Working with teachers confirmed that instructional and educational video content through a tutorial format, used on mobile devices, could support them on a double direction: while they are trained and when they are working with their own classroom students. The use of video showcase through mobile devices supports the building up of teachers' competence. [For the complete proceedings, see ED590271.]