Video DownloadHelper 支持多种类型的流媒体，使插件在视频下载器中独一无二：HTTP、HLS、DASH ……每当站点使​​用不受支持的流媒体技术时，Video DownloadHelper 都能够直接从屏幕捕获媒体并生成一个视频文件。

It's an important and easy to use extension to Firefox. Just start your video, wait some 20 to 50 seconds to allow synchronization to be initialized, then click the three balls logo of the extension, and click the row where the word "streaming" appears in the open curtain-menu. Video DownloadHelpper will start the conversion to standard .mp4 file warning you of the running process with a "1" over the three-balls logo.
It also warns you when your conversion is accomplished, so you'll find your complete .mp4 file under 'yourcomputername'/dwhelper.

this extension is a life-saver!! i downloaded literally hundreds of hours worth of lectures from a subscription-only website. i'll never have to pay for it again. and the video quality is great. cannot thank the developers enough.

Its great! I like it!

Able to download videos where other services failed.

muito boa

works on most sites... and works better than any other.

非常好用，8成的視頻都能下載，操作簡單

es extraudinario

GOOD

I struggled with it at the beginning. Downloads were imcomplete aborted. Once I increased the timeouts significantly and reduced the number of parallel downloads everything was working nice. If you have trouble with this Plug-In have a look at its Behaviour preferences.

a very good video downloader with many download option and convert option.

Very nice and cool.

This was brilliant in the early days, then went through some changes due to FF changing. It is now back to being excellent. The queuing of files and limiting downloads helps a lot, the speed is generally good. The only issue I now have is, if you download several videos, then wish to cancel them, you have to do it item by item. Needs to be a way to select more than one and abort. Simple to use and to set up.

Essential bit of Kit for browsing experience. Excellent app in all respects.