best downloader , i love its sidebar for downloading large number of videos

Полезность сложно переоценить

Лучший впн, лично для меня, я из России.

O DownloadHelper, é muito bom atende plenamente as minhas necessidades.

Superb! Amazingly useful and great design. One of the best add-ons available anywhere. Thanks so much to the developers.

ça marche plutôt pas mal du tout. L'ergonomie est plutôt bien. ça prend pas trop de place dans la barre, et le choix des formats à la sauvegarde est très bien.
Après selon les sources, il faut parfois régler le format dans la vidéo pour avoir le choix de le sauvergarder. Et parfois non.

If there's a better downloader, I haven't found it.

GOOD !!

I've had minor problems with the co-app and didn't use for awhile. but its remained one of the best extension of its kind, and works when many others have failed. go through the settings and pay attention and it will work for you.
EDIT: Sometimes you need to start the video first, other times you CAN'T. and other times you have to start it and select a resolution quality. mostly it's the first.