I found a video a video on youtube : https://www.youtube.com/watch?v=Ugyrzr5Ds8o
Carl Segan on Hindu Civilization, Can anyone confirm if this footage is really from Carl Sagan?
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Yes, it's an episode of Cosmos: A Personal Voyage by Carl Sagan.
Cosmos: A Personal Voyage is a thirteen-part television series written by Carl Sagan, Ann Druyan, and Steven Soter, with Sagan as presenter.
That video is a part of episode 10: "The Edge of Forever"
A copy of that episode can be found on DailyMotion, and that clip starts at 34m50s.
Please note: the cosmology in the video is a bit dated (the episode is 35 years old!)