Udemy has started to encrypt many of the course videos, so downloading them may be impossible/illegal because it involves decrypting DRM'd videos which opens up the author to DMCA takedowns/lawsuits.

This tool will not work without decryption keys. Do not bother installing unless you already have keys or can obtain them! Downloading courses is against Udemy's ...

Udemy 作為全球最大的線上課程學習平台，提供了多樣語言選擇、能夠彈性調整上課播放速度、也可以透過iOS & Android App 隨時隨地學習。Udemy的課程講師多為業界的實戰專家，所以內容可以實際 ...