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....

Siktirin gidin başımdan. Bu kadar karışık birşey olamaz...

Worked couple time for a few videos. Blocks out more & more file types, then stops working. Seems like a trial to entice you to buy the full version.

On Coursera I had a lot of problem, this addon downloads a compressed size reduced verion of the original file. Flash Video Player worked way better.

Doesn't work on Android

Das Addon zeigt nur manchmal das aktuelle Video zum Download an. Oft wird ein vorhergehenden, schon downgeloadetes Video angezeigt. Zuverlässig ist das Addon nicht

Some times it works, but most of the time it does not.
I'll be watching a YouTube video I like, and I'll click on the greendownload arrow in my menu bar.
It will show me a list of videos It can download.
Sometimes the previous video I watched is listed. Sometimes the video I'm watching will show up.
There will often, but not always, be a green ovoid. In that Ovoid, it will say Download 0MB.
Whenever it says 0MB, that means it will act like it's downloading something, but when I open the folder, there's either nothing there, or a file with a size of 0.
I've already paid the $15 bucks or so for the professional version.
What a rip!

Sometimes, about 20% of the time, I do see something I can download, so I'll give it some stars.
But I need to find something that is reliable.
And I see no way to convert to mp3, which is why I wanted this.

It keeps on crashing.

Works about 15% of the time, even when it says there are videos available to download