Modern JavaScript From The Beginning | First 12 Hours
Total watch time
11h 54m
at 1× speed · exactly 11 hours, 54 minutes at 1×
| 1× | 11h 54m |
|---|---|
| 1.25× | 9h 31m 12s |
| 1.5× | 7h 56m |
| 1.75× | 6h 48m |
| 2× | 5h 57m |
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Markdown
[](https://playlistduration.com/video/BI1o2H9z9fo)HTML
<a href="https://playlistduration.com/video/BI1o2H9z9fo"><img src="https://playlistduration.com/badge/video/BI1o2H9z9fo.svg" alt="Length: 11h 54m" width="118" 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/BI1o2H9z9fo returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-09-22 (cached).