CS50 Performances
Total watch time
1h
at 1× speed · exactly 1 hour, 1 second at 1×
| 1× | 1h 1s |
|---|---|
| 1.25× | 48m 1s |
| 1.5× | 40m 1s |
| 1.75× | 34m 18s |
| 2× | 30m 1s |
Average video1h 1s
Longest1h 1s
Shortest1h 1s
Remaining—
Plan to finish
About 2 days at an hour a day
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Days
At one hour a day, every day, this playlist takes about 2 days. Turn on JavaScript to plan around your week.
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Google Calendar (first session)
The .ics file imports into Google Calendar, Apple Calendar and Outlook — one event per study day listing that day's videos. Subscribing instead keeps the plan in step with the playlist: new videos become new sessions. In Google Calendar use Other calendars → From URL with the copied feed URL.
Videos (1)
1h in total · tick what you've watched
Tick videos you've watched — progress is saved in this browser.
| Watched | ||||
|---|---|---|---|---|
| 1 |
 CS50 Performance: Joseph Ong
|
1:00:01 | 2013-11-14 |
No videos match that filter.
Embed a badge
Show the watch time in a README or course description — it links back here and updates itself
Markdown
[](https://playlistduration.com/playlist/PLhQjrBD2T3812pDZjpWvzeyyh0iWmW3ox)HTML
<a href="https://playlistduration.com/playlist/PLhQjrBD2T3812pDZjpWvzeyyh0iWmW3ox"><img src="https://playlistduration.com/badge/playlist/PLhQjrBD2T3812pDZjpWvzeyyh0iWmW3ox.svg" alt="Watch time: 1h · 1 video" width="162" 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/playlist/PLhQjrBD2T3812pDZjpWvzeyyh0iWmW3ox returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-09-22 (fresh). Private or deleted videos are excluded from totals.