Video · CrashCourse
Crash Course Astronomy Marathon • Full Series
Total watch time
8h 21m
at 1× speed · exactly 8 hours, 21 minutes, 26 seconds at 1×
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Markdown
[](https://playlistduration.com/video/HICDzXfCAs4)HTML
<a href="https://playlistduration.com/video/HICDzXfCAs4"><img src="https://playlistduration.com/badge/video/HICDzXfCAs4.svg" alt="Length: 8h 21m 26s" width="135" height="20"></a>Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.
Want the numbers themselves? GET https://playlistduration.com/api/v1/video/HICDzXfCAs4 returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-10-27 (cached).