devinschumacher/how-to-download-udemy.md

## how-to-download-udemy.md

      
    Raw
  

              how-to-download-udemy.md
            
          
    📥 How to Download Udemy Videos

Udemy hosts its lectures behind login-protected APIs, so you can’t just grab a .m3u8 or .mpd URL from the Network tab.
To download reliably, you need some tools.
In this guide ill show you how to do it the manual hacker-kinda-feeling-like way.
If it's too much for you, just pick up the Udemy Video Downloader app and be on your way. or Learn more.
1. Get the Lecture or Course URL

Navigate to the course and lecture you want. Copy the full URL from your browser:
https://www.udemy.com/course/chrome-extension/learn/lecture/25704636

You can use either a lecture link (downloads just that video) or the base course URL (downloads all lectures you have access to).

2. Locate Your Chrome Profile

yt-dlp needs to know which Chrome profile to read cookies from.


Open a new tab and go to:
chrome://profile-internals


Look for Profile Path, e.g.:
Profile Path: /Users/devin/Library/Application Support/Google/Chrome/Profile 197


The last part (Profile 197) is the profile name you’ll use in --cookies-from-browser.

If you see Default, use "chrome:Default".
If you see Profile 1, use "chrome:Profile 1".
Etc.


3. Run yt-dlp with Cookies

Here’s the working command pattern:
yt-dlp \
  --cookies-from-browser "chrome:Profile 197" \
  --referer "https://www.udemy.com/course/chrome-extension/learn/lecture/25704636" \
  --add-header "Origin: https://www.udemy.com" \
  -N 16 -f "bestvideo+bestaudio/best" \
  --merge-output-format mp4 \
  "https://www.udemy.com/course/chrome-extension/learn/lecture/25704636"

4. What Each Flag Does


--cookies-from-browser "chrome:Profile 197" → grabs your authenticated cookies from Chrome Profile 197 (adjust if your profile differs).
--referer → Udemy validates requests against the lecture URL.
--add-header "Origin: https://www.udemy.com" → mimics what a browser would send (prevents 403s).
-N 16 → downloads 16 fragments in parallel, which speeds up long lectures.
-f "bestvideo+bestaudio/best" → picks the best quality video + audio and merges them.
--merge-output-format mp4 → ensures the final file is MP4, even if streams are WebM.


5. Performance Options


Faster with more concurrency
Increase fragments:
-N 32
(but 16 is usually stable).


Fastest with aria2c
Install aria2:
brew install aria2
Run with:
yt-dlp \
  --cookies-from-browser "chrome:Profile 197" \
  --referer "https://www.udemy.com/course/chrome-extension/learn/lecture/25704636" \
  --add-header "Origin: https://www.udemy.com" \
  --downloader aria2c \
  --downloader-args "aria2c:-x 16 -s 16 -k 1M" \
  "https://www.udemy.com/course/chrome-extension/learn/lecture/25704636"


6. Notes & Gotchas


You must be logged in to Udemy in that Chrome profile, and the lecture must play in your browser.


Course ownership required — yt-dlp won’t bypass Udemy’s paywall.


Update yt-dlp regularly since Udemy’s backend changes often:
pip install -U yt-dlp


Profile mismatch = 403s → always confirm profile name in chrome://profile-internals.


7. Quick Copy-Paste Cheatsheet

Default speed (works fine):
yt-dlp --cookies-from-browser "chrome:Default" <lecture-url>
Faster (parallel fragments):
yt-dlp -N 16 --cookies-from-browser "chrome:Default" <lecture-url>
Fastest (aria2c):
yt-dlp --downloader aria2c --downloader-args "aria2c:-x 16 -s 16 -k 1M" --cookies-from-browser "chrome:Default" <lecture-url>

✅ With this setup, you can download Udemy lectures you own in high quality, save them as MP4, and speed up the process with concurrency or aria2c.
No results found