What makes the natural log "natural"? | Ep. 7 Lockdown live math
Total watch time
1h 15m
at 1× speed · exactly 1 hour, 14 minutes, 54 seconds at 1×
| 1× | 1h 14m 54s |
|---|---|
| 1.25× | 59m 55s |
| 1.5× | 49m 56s |
| 1.75× | 42m 48s |
| 2× | 37m 27s |
Embed a badge
Show the length in a README or course description — it links back here and updates itself
Markdown
[](https://playlistduration.com/video/4PDoT7jtxmw)HTML
<a href="https://playlistduration.com/video/4PDoT7jtxmw"><img src="https://playlistduration.com/badge/video/4PDoT7jtxmw.svg" alt="Length: 1h 14m 54s" 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/4PDoT7jtxmw returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-09-22 (cached).