FindLectures.com is a curated search engine for quality online lectures, interviews, documentaries, and historically significant speeches.

The video list can be navigated with a deep topic taxonomy, which allows the discovery of interesting niche topics.

Videos are ranked using over a dozen quality measures, so that you can spend time learning, not looking.

Ranking and inclusion are affected by topic variety and novelty, length, audio quality, and speaker presentation style.

Other factors include the speaker having a unique background and material being the appropriate difficulty level for being a standalone content aimed at an educated audience.

Via Ana Cristina Pratas