reddit.com
r/Documentaries points to a Reddit community or thread with discussion, updates, troubleshooting, or shared resources.
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Search published websites, apps and repositories.
arte.tv
ARTE is an educational resource for documentaries, courses, books, reference material, or self-learning.
documentary.net
The Documentary Network is a site for watching videos and documentaries. It features drone and timelapse clips and videos on subjects such as poverty in the USA, deep fake detection and a stolen artwork. Videos are listed with durations and categories.