Click the extension icon when you watching a Udemy course video the extension will get that video's url and when you click the download button download will start immediately. Don't forget to choose video quality before downloading.
- Get the repo and unzip.
- Go to chrome extensions page.
chrome://extensions/
- Open Developer mode by tapping the switch on the top of the page.
- Click the Load unpacked button and select the folder that you unzip.