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I've got a small problem with dwhelper. Now when I'm trying to download anything from youtube DH doesn't download and creates only empty files. What can be the problem?

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up vote 1 down vote accepted

From their ChangeLog:

  • v4.8.6
  • Fixed bug #303: Due to a change at YouTube, cannot download some high-quality videos anymore.

Also, see here (not sure if this is saying the problem is fixed in v4.8.6, or if there are additional troubles beyond that version that are still under repair):

Recent changes at YouTube broke the download of high-quality variants on some videos. A fixed version of DownloadHelper is currently being reviewed at Mozilla and should be available very soon. By that time you can install version 4.8.6 from this place.

Hope that helps.

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