Video DownloadHelper is an extension for the Mozilla Firefox web browser. It allows the user to download videos from sites that stream videos though the HTTP protocol, such as YouTube. The extension was developed by Michel Gutierrez. The current stable release of Video DownloadHelper is version 4.9.4, released on July 25, 2011.
Since version 4.9, Video DownloadHelper has introduced an additional video capture method through direct grabbing on the screen. This feature relies on CamStudio when running on the Windows platform and on RecordMyDesktop when on Linux, Video DownloadHelper providing a one-click capture start capability, without the need to manually specify the region of the screen to be captured.
As of August 2011, Video DownloadHelper is being run on over 6,500,000 browsers daily[1], making this extension the second most popular extension after Adblock Plus[2].