Youtube — Countless videos on the Kochs — most informative and
critical — sorting only for over those 20 minutes in length. These
are documentaries, exposes, activists, and podcasts. Speaking of
podcasts there are additional venues for podcast series which I didn’t
check. These too are available.
https://www.youtube.com/results?search_query=koch+brothers&sp=EgIYAg%253D%253D