Transmedia is basically a useless word, but I’m using it here because that’s what TIFF uses it. Transmedia really is just media nowadays, not to get hung up on the word though….
Anyway, last year I attended the TIFF Industry Conference and enjoyed it. Recently, TIFF posted some of their recordings of the conference, two of which are worth watching if you’re doing anything related to visual and interactive storytelling:

They have more on the YouTube channel.