Fabulous Rated 5 out of 5 stars

Oh God! This a fabulous add-on. Has been tested on Win7x64 SP1 with FFMPEG64 and worked like a charm. the "muxing" is working with no any single issue. Thanks a lot for the developer. For guys who're complaining, please download a good copy of FFMPEG at http://ffmpeg.zeranoe.com/builds/ and in case in the future, the add-on starts to download 0 sized videos, that's mean the Youtube has changed something, so do not come here to complain about the add-on. it is enough for the dev. keeping himself up to date with such changes.

We appreciate the support!!! Thank you!!!

Very good and very bad points Rated 2 out of 5 stars

The good: It can download all DASH formats! Very useful. A convenient button is provided.

The bad: It requires ffmpeg to even recognize audio at all, instead of showing raw streams. Once you configure ffmpeg, you have to restart the browser, but it doesn't tell you that. Once you configure ffmpeg, there's no way to download bare DASH video streams, you have to let it mux in audio. It forces either H264/AAC or WEBM/Vorbis on you, but the best WEBM/AAC is always the absolute top quality available. The button is impossible to move, it's permanently welded to the left of the address bar, instead of being able to move it to the main menu or elsewhere, and it's always there on non-YouTube sites. No right click options.

Enough problems that despite the fact that it works, unlike many plugins, I'll probably uninstall it and look for an alternative.

fantastic team support Rated 5 out of 5 stars

Had a problem with a url with download size 0...write to support...and they answer immediately!..what I can say?
marvellous plug in...and an amazing developper team...thanks again guys!

Glad we could be of help! Thanks for the review!

0 bytes Rated 2 out of 5 stars

Version 5.5.1 ... Was doing great at first... then all of a sudden files become 0 bytes.

This review is for a previous version of the add-on (5.4.5). 

Rated 4 out of 5 stars

CYS worked in the past fine for me, also now seems to do the job. So far so excellent!
However: now on a new system I find no longer an option to save my settings; the selection of formats I make gets ignored completely and the preferences window has only a "close" button, no "save" to be found. FFMPEG path is remembered and and also the columns. They do not fit into the detailed menu, though.
So at the moment the usability has (minor?) glitches, but the functionality seems to be complete.
Therefore only 4 stars for a 5 star addon.

System: FF 30.0 CYS 5.3.0 under SolydK, system up-to-date
(and yes, I restarted FF several times...)

This review is for a previous version of the add-on (5.3.0). 

Thanks for your review. We've had no problem in CentOS. This sounds like it may be a possible corruption, please install CYS into a new, empty profile and let us know if it solves your problem (cytsaver@hotmail.com), thanks.

Rated 4 out of 5 stars

Please add playlist download

This review is for a previous version of the add-on (5.2.1). 

CYS has all the capabilities to also add bulk-downloading functionality (DASH included). Look out for it in a future update, thanks.

Rated 5 out of 5 stars

Works PERFECTLY. Not just plug and play but very easily set-up. Since it is able to save the DASH formats I have given this addon the full five stars. I was using other youtube savers beforehand yet 1080p was always unavailable so I am thankful and have respect for the programmer(s). I am using v5.3.0 and always the newest Firefox.

This review is for a previous version of the add-on (5.2.1). 

Much appreciated, thank you. Please try the interim fix (v5.3.0) here:


Rated 5 out of 5 stars

Works perfectly. Pointed the add-on to where my ffmpeg.exe was, added the add-on button to my toolbar and restarted Firefox.
No problems downloading 1080p / high quality audio. No problems with ffmpeg combining the audio + video files (except for the known issue of needing to say 'yes' to overwrite existing file in this version).

This review is for a previous version of the add-on (5.2.1). 

Thanks for your review...an update should be ready later today.

Works Great Rated 5 out of 5 stars

This add-on performs as advertised.
Thank you for creating it.

This review is for a previous version of the add-on (5.2.1). 

Rated 1 out of 5 stars

Forget it. It doesn't work. The icon doesn't show when starting any Youtube video. Have installed FFmpeg correctly and using Windows 7 and FF 29.0.1

This review is for a previous version of the add-on (5.2.1). 

The program does work, you could just click on the "Customize" button in Firefox to drag the CYS icon back to your toolbar. Your "review" is actually a bug report, however, in this section, such posts are unwelcome, as described above - our support email address is meant for reporting bugs.

We are proud of our work, and frankly, we feel your 1-star rating is entirely unfair and uncalled for. Will you, please, write a proper review in stead? Thanks

Rated 5 out of 5 stars

Thanx for creating such a great youtube downloader add on, sad i found it only recently and not before. I usually love downloading youtube videos in 480p and CYS gives me that quality, so thanks again. But i have just one question as how can i download 480p videos through CYS using idm (internet download manager). As it converts and downloads fine using firefox inbuilt download manager but i don't know how can i get to download the full 480p youtube video (audio+video) through the 480p link copied from CYS option using idm. As when i copied the 480p link from CYS option for any youtube video page and put that link in idm, idm downloads the video in an unrecognized file. Since i use idm majorly to download files, it would nice to guide me how can i download youtube videos in 480p using CYS links in idm.

This review is for a previous version of the add-on (5.2.1). 

Hi, thanks for the nice review.

Frankly, CYS is not meant to be a front-end for IDM (or any other download manager). With the changes YT made to 480p and 1080p+ videos, it makes little sense using downloaders. On download completion, there are additional steps to take to merge separate video and audio tracks into whole MP4/WebM videos. Downloaders will not know to do this for you - CYS does.

If having to use the command line does not scare you, however, CYS gives you the option to save video/audio links to the clipboard. For DASH formats - ones with separate video and audio links - CYS copies both links to clipboard at once, thus you will need to paste them into an editor, then re-copy and paste the 2 links into IDM separately. Then you will need to merge the separate tracks into complete MP4/WebM videos manually, using FFmpeg on the command line.

Thanks again, and please, feel free to spread the word so others can find CYS earlier!

Add features ? Rated 4 out of 5 stars

Really great job !
But i want to suggest you to add some new features. Indeed, after saving any video i add title, author name and original tags of this video (which are include in the HTLM tag meta "keyword") in the metadata of the saved video. I saw it can be possible to add this metada in video by using the '-metadata' option in ffmpeg.
For exemple : ffmpeg -i -metadata title="Ran ran ru"-metadata author="McDonaldo"-metadata year="25 jan 2014" -metadata comment="music,song,video,burger,mcdonald,etc" output.mp4

Please take notice of this idea and thank for this tool ;-D

This review is for a previous version of the add-on (5.2.1). 

Absolutely, we could add this as a new feature, with a checkbox in Options. Look out for it in a future update. Thanks for the review!

Rated 5 out of 5 stars

Awesome plugin! Is there anyway you can add a batch download function? Anyhow, thanks for the good work!

This review is for a previous version of the add-on (5.2.1). 

We will consider your feature request...thanks for the 5 stars!!

Rated 5 out of 5 stars

I have a slow internet connection 1mb/s.
So when google decided to switch to this craptastic DASH format people like me are pretty doomed now. We can't watch hd, because YT decides for us. What kind of attitude is that?! They should learn from vimeo.
Anyway, CYS is our saviour, because now at least i can wait for the video to download and watch HD in my player. So thank you guys!

ps. whats the difference between fmt136 and fmt22?
both are mp4 but but have different filesizes

Which one should give me the best picture quality, i dont care for audio in this particular example

This review is for a previous version of the add-on (5.0.10). 

Fmt136 is the DASH format video, while fmt22 is the non-DASH version. Considering that the audio track is of ever so slightly higher quality in fmt136 than in fmt22, and that the fmt136 file is significantly smaller, fmt22 is expected to provide higher image quality than fmt136. Thanks for the 5 star review!!

Reply back to CG-Addons Rated 5 out of 5 stars

As you requested here's the videos I tried to download.
^These are the ones that did not mux

^this is the one that did

I needed these for a video I'm working on

Hope this helps in the troubleshooting process

This review is for a previous version of the add-on (5.0.7).  This user has a previous review of this add-on.

Thanks for that information. We tested all three links and all 3 muxed successfully (downloaded simultaneously). When the 2nd file is finished downloading, muxing will take several minutes to begin. This is where you may feel it has failed but it has not. Remember, the files you are downloading are huge, 3hrs, 5hrs and 8hrs long!!! It takes some time but all 3 files will complete.

If you still need help, please contact us at the support email, thanks for your review.

Windows 8 x64, Mozilla Firefox 26.0 Rated 3 out of 5 stars

Нет ссылок на скачивание в результатах поиска и в плейлистах. После отключения, перезагрузки и включения перестал работать.

This review is for a previous version of the add-on (5.0.7). 

За помощью или сделать запрос на выделение видео, свяжитесь с нами по электронной почте поддержки.

Awesome! works for 1080p, 1440p, 4k, etc! Rated 5 out of 5 stars

Awesome! works for 1080p, 1440p, 4k, etc! The only one that can do this right now!

This review is for a previous version of the add-on (5.0.7). 

Thanks for the review!

Rated 5 out of 5 stars

Works with 4k videos after downloading the ffmpeg installer. N00b mistake select the directory ffmpeg is in instead of the file itself.

This review is for a previous version of the add-on (5.0.7). 

Thanks for the 5 stars!

This Video Contains restricted content. Rated 4 out of 5 stars

The above message pops up on some videos when I try to download mp3 version.
Thus I downgraded the addon from 5 stars to 4.

This review is for a previous version of the add-on (5.0.7).  This user has a previous review of this add-on.

Clearly you are confusing CYS with another add-on. First of all, CYS could never generate a “This Video Contains restricted content” message because it’s not built into the program!!! Second, in the email that you sent us, you describe the add-on that you are using as having an orange “Convert to MP3” button. There is no such button in CYS!!! All conversions occur automatically when you select a format from the drop down list.

critical fact Rated 4 out of 5 stars

Hello!today installed your v5.0.7 add-on.it looks promising very.now issue I want to post.
1. download speed of DASH is low, like actually playing. my guess, it cant be otherwise
2. when I early do terminate download, only video stream stops!audio continues download even if I close actual TAB. only restart can stop audio.
EDIT: after I disabled option "For Dash formats, hide audio file.." 2nd problem disappear!!

This review is for a previous version of the add-on (5.0.7). 

1.The next update will include faster download speeds of DASH formats.
2.Yes, by default, when downloading DASH videos, the audio is hidden from the Download window. You can unhide the audio in Options> Download tab.

Thanks for your review.