CS50 Sections 2015
Total watch time
12h 33m
at 1× speed · exactly 12 hours, 33 minutes, 7 seconds at 1×
| 1× | 12h 33m 7s |
|---|---|
| 1.25× | 10h 2m 30s |
| 1.5× | 8h 22m 5s |
| 1.75× | 7h 10m 21s |
| 2× | 6h 16m 34s |
Plan to finish
About 13 days at an hour a day
Pick a daily pace and the days you'll watch. Ticked videos are skipped.
At one hour a day, every day, this playlist takes about 13 days. Turn on JavaScript to plan around your week.
Videos (50)
12h 33m in total · tick what you've watched
Tick videos you've watched — progress is saved in this browser.
| Watched | ||||
|---|---|---|---|---|
| 1 |
 Supersection, Less Comfortable
|
37:24 | 2015-09-15 | |
| 2 |
 Supersection, More Comfortable
|
1:22:02 | 2015-09-15 | |
| 3 |
 Command Line
|
17:53 | 2017-01-03 | |
| 4 |
 Conditional Statements
|
9:13 | 2015-10-07 | |
| 5 |
 Data Types
|
14:11 | 2015-10-07 | |
| 6 |
 Loops
|
9:23 | 2015-10-07 | |
| 7 |
 Operators
|
12:21 | 2015-10-07 | |
| 8 |
 Administrivia
|
6:43 | 2015-10-07 | |
| 9 |
 Arrays
|
14:02 | 2015-10-07 | |
| 10 |
 Command Line Arguments
|
7:52 | 2015-10-07 | |
| 11 |
 Functions
|
20:25 | 2015-10-08 | |
| 12 |
 Magic Numbers
|
7:28 | 2015-10-07 | |
| 13 |
 Variables and Scope
|
7:42 | 2015-10-07 | |
| 14 |
 Algorithms Summary
|
4:37 | 2015-10-20 | |
| 15 |
 Binary Search
|
9:32 | 2015-10-07 | |
| 16 |
 Bubble Sort
|
5:55 | 2015-10-07 | |
| 17 |
 Computational Complexity
|
12:36 | 2015-10-07 | |
| 18 |
 GDB
|
13:19 | 2015-10-08 | |
| 19 |
 Linear Search
|
2:50 | 2015-10-07 | |
| 20 |
 Insertion Sort
|
4:14 | 2015-10-07 | |
| 21 |
 Merge Sort
|
11:54 | 2015-10-07 | |
| 22 |
 Selection Sort
|
4:01 | 2015-10-07 | |
| 23 |
 Call Stack
|
6:17 | 2015-10-07 | |
| 24 |
 Defining Custom Types
|
3:33 | 2015-10-07 | |
| 25 |
 Dynamic Memory Allocation
|
14:22 | 2015-10-07 | |
| 26 |
 Hexadecimal
|
9:28 | 2015-10-07 | |
| 27 |
 Recursion
|
13:51 | 2015-10-13 | |
| 28 |
 Structures
|
8:02 | 2015-10-07 | |
| 29 |
 Doubly-Linked Lists
|
9:51 | 2015-10-14 | |
| 30 |
 File Pointers
|
18:22 | 2015-10-14 | |
| 31 |
 Singly-Linked Lists
|
23:23 | 2015-10-14 | |
| 32 |
 Data Structures Summary
|
8:53 | 2015-10-19 | |
| 33 |
 Hash Tables
|
19:01 | 2015-10-19 | |
| 34 |
 Queues
|
15:51 | 2015-10-19 | |
| 35 |
 Stacks
|
14:20 | 2015-10-19 | |
| 36 |
 Tries
|
16:24 | 2015-10-19 | |
| 37 |
 CSS
|
13:41 | 2015-10-26 | |
| 38 |
 HTML
|
21:35 | 2015-10-27 | |
| 39 |
 HTTP
|
15:04 | 2015-10-26 | |
| 40 |
 Internet Primer
|
19:48 | 2015-10-26 | |
| 41 |
 IP
|
15:35 | 2015-10-26 | |
| 42 |
 PHP Syntax
|
39:18 | 2015-11-03 | |
| 43 |
 TCP
|
9:32 | 2015-10-26 | |
| 44 |
 Ajax
|
10:50 | 2015-11-10 | |
| 45 |
 DOM
|
16:34 | 2015-11-10 | |
| 46 | Private video | — | ||
| 47 |
 MVC
|
12:28 | 2015-11-02 | |
| 48 |
 PHP for Web Development
|
25:03 | 2016-06-16 | |
| 49 |
 SQL
|
29:09 | 2015-11-02 | |
| 50 |
 JavaScript
|
27:15 | 2016-09-28 |
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
[](https://playlistduration.com/playlist/PLhQjrBD2T383cQ0XdSgOANm9rfmuqmczI)<a href="https://playlistduration.com/playlist/PLhQjrBD2T383cQ0XdSgOANm9rfmuqmczI"><img src="https://playlistduration.com/badge/playlist/PLhQjrBD2T383cQ0XdSgOANm9rfmuqmczI.svg" alt="Watch time: 12h 33m · 49 videos" width="210" 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/PLhQjrBD2T383cQ0XdSgOANm9rfmuqmczI 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.