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I want to download recorded lecture videos from my college website which requires authentication. I tried a few ways mentioned below and all failed.

  1. Used IDM and got an error saying that IDM can't download this protected stream.

  2. Used HLS chrome extension which downloads.TS files. These TS files are of a few hundred MB and when opened using VLC or Windows Media Player they show duration 0:00.

  3. Tried GetFLV app and after pasting the URL link, it throws a warning stating that video can't be downloaded.

  4. After inspecting the web page I noticed that video has a blob URL. I couldn't get the video downloaded after pasting that URL in jdownloader2.

I couldn't find a working solution.

Jim Moriarty
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  • Have you tried looking at the .m3u8 files? Do either of them contain EXT-X-KEY tags or EXT-X-SESSION-KEY tags, if so, the stream might have DRM which makes it useless without the appropriate key. – colde Jul 21 '20 at 20:23
  • @colde I found these lines `#EXTM3U #EXT-X-VERSION:3 #EXT-X-MEDIA-SEQUENCE:0 #EXT-X-ALLOW-CACHE:YES #EXT-X-TARGETDURATION:12 #EXT-X-KEY:METHOD=AES-128` How to deal with this? – Jim Moriarty Jul 24 '20 at 12:42
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    In that case, you are dealing with encrypted HLS. You can try and see if EXT-X-KEY has a URL where you can fetch the key. If not, it might be a bit tricky. You might also want to look at https://stackoverflow.com/questions/50628791/decrypt-m3u8-playlist-encrypted-with-aes-128-without-iv – colde Jul 24 '20 at 16:07

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