Simple and hacky program to download a udemy course, has support for DRM videos but requires the user to aquire the decryption key (for legal reasons).

Requirements

You would need to download ffmpeg and mp4decrypter from Bento4 SDK and ensure they are in path(typing their name in cmd invokes them).

Usage

quick and dirty how-to

You will need to get a few things before you can use this program:

Decryption Key ID
Decryption Key
Udemy Course ID
Udemy Bearer Token

Setting up

rename .env.sample to .env
rename keyfile.example.json to keyfile.json

Aquire bearer token

open dev tools
go to network tab
in the search field, enter api-2.0/courses
click a random request
locate the Request Headers section
copy the the text after Authorization, it should look like Bearer xxxxxxxxxxx
enter this in the .env file after UDEMY_BEARER=

Aquire Course ID

Follow above before following this
locate the request url field
copy the number after /api-2.0/courses/ as seen highlighed in the above picture
enter this in the .env file after UDEMY_COURSE_ID=

Key ID and Key

It is up to you to aquire the key and key id.

Enter the key and key id in the keyfile.json

Start Downloading

You can now run python main.py to start downloading. The course will download to out_dir, chapters are seperated into folders.

Getting an error about "Accepting the latest terms of service"?

If you are using Udemy business, you must edit main.py and change udemy.com to <portal name>.udemy.com

Credits

https://github.com/Jayapraveen/Drm-Dash-stream-downloader - for the original code which this is based on
https://github.com/alastairmccormack/pywvpssh - For code related to PSSH extraction
https://github.com/alastairmccormack/pymp4parse/ - For code related to mp4 box parsing (used by pywvpssh)