He opened Udeler, clicked “Settings”, and entered his Udemy email & password . But Udemy now uses captcha and 2FA – Udeler couldn’t handle it. Workaround: He had to generate a Udemy API token by logging into Udemy in a browser, inspecting network requests, copying the Authorization: Bearer <token> header, and pasting that into Udeler’s advanced settings.

Note: Udeler is no longer actively maintained, may break with Udemy’s updates, and violates Udemy’s terms of service. This story is for educational/historical purposes only. The Night Before the Flight

Udeler is a relic. If you truly need offline access, use Udemy’s own mobile app (legit offline viewing) or learn yt-dlp – the modern, powerful alternative. Would you like the modern yt-dlp method instead?

On the plane, he watched via VLC on his laptop. To get videos on his iPad, he used ffmpeg to remux MP4s and uploaded via iTunes File Sharing. Clumsy, but it worked. The morning after Alex landed with all videos intact. But he later realized: Udeler broke every time Udemy changed its API. Eventually, he switched to youtube-dl with --cookies – far more reliable.

Once authenticated, Udeler loaded his course list. He found “Data Viz Masterclass” and clicked “Load Course” . A tree view appeared – all videos, subtitles, and assets.

Alex had a 14-hour flight to Tokyo and a half-finished Udemy course on data visualization. No Wi-Fi on the plane. "I need to download these videos," he muttered.