Interesting point @jeffwgallant on open resources remixed through broadcast television programs.
In Quebec, over decades, «téléuniversité» has been an important driver for the development of relevant material. Much of those resources were funded by the provincial government, few of them are explicitly licensed as open. For instance, Université TÉLUQ - Formation à distance (teluq.ca) has a strong basis in television-based university courses (including Massive Courses with 150k concurrent learners, getting printed material by mail, back in the 1970s).
There’s work being done with Savoir média. Bringing back the UNESCO recommendation to bear on such work could help ensure these television programs can become as openly licensed as possible.