it requires a companion app

下载视频要合作软件，下载一个几分钟的视频下载完毕要合成一个多小时。

What is this 30 dollar charge for watermark shiz? Why be free then suddenly decide to charge money?

fcking sh!t

Can't download without companion app, external site, executable file. Get fucked.

Used to be the best. Now it downloads in a fair amount of time, then says it is going to take an hour+ to aggregate a 9.5 minute youtube video which is a still screen and music. If you cancel the aggregating, you lose it all, and I can find no way to stop it. All this since the companion app requirement although you can go without but the downloading seems to have been capped further then.
I'll find something else now.

Came back a year later and it has improved in time it takes and still tells me it requires a companion app, however, now there is a huge QR code all through the video. Is there a point?

Installs a big QR code on screen of all downloads. Spoils functionality.

Tried it out, but unfortunately it takes forever to download small files and uses a huge QR code in the corner of the screen to extort you to buy a license. I found and donated to an alternative software that doesn't do this. Thanks anyways.

Adding crappy QR codes to a video is a real no-go!

Just leave the video alone, no converting, no editing, no QR crap addition!

Este complemento tiene un comportamiento sospechoso, intentando conectar a una página en segundo plano y sin solicitud por parte del usuario. Esta conexión es siempre bloqueada por el antiphishing de ESET. Solicito que Mozilla lo investigue.

This add-on used to be great years ago but has become a complicated mess that fails to work reliably.

It lure you in and you need to pay for it, or it will add a awful QR code in the corner of your video.

I've used Video Downloader for several years but for past month it is no longer working. Please fix this. Why aren't you checking on it yourselves!

it" great. Does what it says. downloads videos when others cannot. It is now May 21, 2019. This extension has not worked for weeks. It was my "Go-To" video downloader. Now it downloads to the end and gets an error or dose not work at all.

Just rip-off. Now you need to install same secondary app so they can take your money. Forget about free part, it's false. It was good quite a while ago, you didn't have to install any software from dubious sources, but now...

It's bad and going downhill fast. I do not recommend.

At first it worked some of the time, then they makes you get additional add-ons which you then have to pay money for if you want to remove a watermark.

The watermark is ridiculous. Usually the free version although has some inconveniences it is still usable but that big watermark is totally unacceptable. I could buy the license, and I'd have done it because I need a premium quality conversion but after that I'm not giving you my money. You are ridiculous

NOT free. First it makes you download another app and install it on your PC. I did this because I used to use this program years ago and it used to be good. Then after you install this it makes you pay around 20$ to use it. False advertising.

not working as expected