This app allowed me to download THREE youtube vidoes, then started displaying "waiting for server" and asking me to leave a review. Here's your review: not impressed.

при скачивании требует установить за деньги дополнительный шлак

Intentionally limited functionality. Only works on a few sites. Addon is used as a hook to generate sales of a Windows-based video downloader software.

They want you to pay to download high-quality format. You can still download at medium qyality though. Disappointing.

Worked great on CornHutPremium like two weeks ago. This week, not so much.

Такое себе дополнение. Нужно устанавливать ещё одно их стрёмное платное приложение для скачки качественного видео.

it will download 5 or 6 videos and then it completely breaks and won't download videos anymore when you click the download buttons

Well......it when you can't download a video, it gives you the option to "buy" the "ultimate" version. Why not just do that? Offer the "ultimate" version from the beginning and bill before the first download.

Not working on Android

This addon doesn't seem to be very consistent in letting you download videos. I tried it with several of my subscriptions and it doesn't let you download 1080p on any of them.

VK: "No videos found". Firefox 67.0b7 x64, Windows 10.

Options don't work.
https://postimg.cc/9RQWvyKf

It has been working well but now it doesn't download the VIMEO videos

It's not for free....