You don't need "server infrastructure" to download and merge DASH, you only need FFmpeg and a command line. There are free utilities anyone can use. Ridiculous.

Please let us know when and if this add-on will be available for use again. It has been great in the past, and I have sent money a number of times.

Awesome extension. My experience has been excellent.Hope it would continue in future too.
This is very best extension as for as you tube downloads are concerned. I recommend this to all users of firefox.
However in recent months , may be for about 4 to 5 months not working, It always says that it has been blocked by youtube. Even though button shows to be active and when pressed says it is getting connected but gets the video in mp4 or mp3 version.
Let us know what is the problem. Some people reported even after paying money bought the app for it, it does not work!! Really bad. I saw that site YT1s works well, then why not this app , which many YT users depend on.

UPDATE 10/28/2025: Loved this add on 7 years ago and gave it a 5 stars. But now it's not working right; I get 3 downloads buttons under the video. There is no place to report the problem for help. I deleted it a few times and reinstalled hoping it would clear itself out, but no luck. Now I give it 2 stars.

I paid 30$ but don't get the service

Some features are only available for "PRO" users.

Not too useful: can't download private videos, and can download mp3s only in 256 kb/s bitrate. High quality (320) is not an option. Some higher functions are available only in paid form.

Nothing extra, doesn't do anything else other apps also do.

Не качает в 1080. Только в 720. За 1080 просят купить.

This add-on is functionally well but it frequently stop working and ask to donate again.

not work 1080p

Doesn't work with 1080 p or mp3... the description of this add on is false for a long time.

Бесполезно. Скачивание в mp3 только для PRO юзеров.

Для скачивания в высоком качестве требует денег. Есть другие аддоны лишенные такого недостатка

Page pops up telling you can't download HD videos unless you buy the premium version. As of 06/11/2019 some videos (such as age restricted ones) won't load with this add on enabled.

Started off working great but after 2 weeks wouldn't download because it wanted me to buy something for downloading at 1080p even though I had clicked on 128p. A bit of scam if you ask me.