Data Structures in Javascript
Total watch time
30m 5s
at 1× speed · exactly 30 minutes, 5 seconds at 1×
| 1× | 30m 5s |
|---|---|
| 1.25× | 24m 4s |
| 1.5× | 20m 3s |
| 1.75× | 17m 11s |
| 2× | 15m 3s |
Average video30m 5s
Longest30m 5s
Shortest30m 5s
Remaining—
Plan to finish
About 1 day at an hour a day
Pick a daily pace and the days you'll watch. Ticked videos are skipped.
Days
At one hour a day, every day, this playlist takes about 1 day. Turn on JavaScript to plan around your week.
Subscribe (keeps updating)
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)
30m 5s in total · tick what you've watched
Tick videos you've watched — progress is saved in this browser.
| Watched | ||||
|---|---|---|---|---|
| 1 |
 Zigzag (Spiral) Level Order Traversal 🔥 | Amazon Interview Question
|
30:05 | 2020-08-02 |
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/PLlasXeu85E9fIfUOZTRAmjpHMqlfvyE9y)HTML
<a href="https://playlistduration.com/playlist/PLlasXeu85E9fIfUOZTRAmjpHMqlfvyE9y"><img src="https://playlistduration.com/badge/playlist/PLlasXeu85E9fIfUOZTRAmjpHMqlfvyE9y.svg" alt="Watch time: 30m 5s · 1 video" width="189" 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/PLlasXeu85E9fIfUOZTRAmjpHMqlfvyE9y 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.