me gusta es bueno pero baja la calidad de los colores a veces

Clearly I have used this add-on for some time. I have had very few problems. The speed of the downloads is most dependent on the specific site - on average quite acceptable. Sometimes there are a variety of choices for a particular video. The user has to determine which is the proper one, although that is not usually difficult.
I am very happy with this program. It does just what I want.

Best tools!

Il Miglior componente aggiuntivo di Firefox

I have several hobbies and use tutorials to continue learning about then. I have used Video DownloadHelper for years to help me download the best of them. It downloads seemingly every format of video, although with the newer version of Firefox it needs an extra bit of separate code to help it achieve it, but that's not a problem. I haven't yet found another addon that can do the same.
So now I have a video library of all my most useful tutorials, thanks to Video DownloadHelper. Highly recommended!
P.S. It does lot of other things as well.

working as of 14 Feb 2018

A large number of settings and the ability to download the file in high resolution. Cool.

no problems at all.

I like Video DownloadHelper because it is easy to use and downloads very quickly. Once I figured out how to use it, I found it to be a very efficient tool. I recommend it to Mozilla users.

It's easy, safe and does the trick. It can download almost every video that you can play on your computer from anywhere.

A melhor extensão do mundo para baixar vídeos e qualquer arquivo de mídia em qualquer site.

Très pratique, détecte automatiquement les vidéos et met en pause les téléchargements successifs pour éviter d'en avoir trop en même temps.

Incrivel esse addons, recomendo adquirir, simplesmente, maravilhoso

很好 非常不错

It's good.
I love the fact that I'm not forced to install companion app directly to my system - I can do it in my user-space.

Nice app

Even the optional addon to download is a simple install with no hassle, adware or virus crap. Makes it a hell of a lot easier. Thanks guys for taking the high road and not selling out.

me permite descargar solo que aveces es medio complicado me gustaria fuera mas sencillo

Cumpre perfeitamente o que promete: é leve, cheio de possibilidades e rápido nos download. Assim que puder farei minha contribuição aos seus fantásticos desenvolvedores. Obrigado!

Ich benutze nun schon seit längerer Zeit dieses Programm und ich bin voll und ganz überzeugt davon. Einfache Bedienung und gute Qualität der Downloads machen es für mich unverzichtbar.
Bernd aus Leipzig

Es un excelente plugin, por ahora todo ha salido de maravilla.

Обнаруживает почти все ссылки на закачку, огромное количество поддерживаемых сайтов.

Интерфейс понятный и функциональный, ничего лишнего. Действительно полезная утилита.