ramtinarefkia Is Udeler authentication working? I've tried using Credentials | Authentication Plugin | Access Token, none of them works!
If you have problems with any of the Widevine key-extractors, it's easier to use YT-DLP.
If you login to Udemy first, then either export the cookies (Netscape format, then save as text file) -- or choose to use the new "cookies-from-browser" param -- you shouldn't have a problem.
--cookies-from-browser BROWSER ( example: --cookies-from-browser chrome )
--cookies FILE ( example: --cookies MyUdemyCookieExport.txt )
YT-DLP also has Udemy-specific authentication built-in, so that you can pass your username/pass, for example:
Complete Command Line Example for Udemy:
yt-dlp -u UDEMY.USER -p UDEMY.PASSWORD --cookies-from-browser chrome -o "%(playlist)s/%(chapter_number)s - %(chapter)s/%(title)s.%(ext)s" "https://www.udemy.com/Root-of-Your-Course"
If you run into problems, you're welcome to send me a PM and I'll work with you to get it working.