Your efforts have not gone un-noted, Young Peter. In the last few years, I have spent hours talking about the use of video in the classroom. One question that seems to come up again and again is the question of authentic materials. Somehow, the word 'authentic' has attained a magical status in English language teaching.
People always assume that 'authentic' means good.
It is seen automatically as a sign of approval. In the article, I take 'authentic' to mean originally designed for showing to a native-speaker audience. In my early years of using video, I was often desperate to use the medium and devoid of materials. I had to use authentic materials, and I did. You have to review hours of tape in order to find a few minutes of useable material.