I had a little problem with the Paypal approach in Firefox. But that one has come up and it works fine now.

Update 2021:
After 4 years of using this plug-in and paying for it, Dishita is still working hard on keeping it up to date. He works very hard and this plug-in is awesome, most of you probably use it for free then moan when YouTube break it, stop leaving him crap reviews, it's not his fault!
If you use it, pay for it, it's really cheap and ensures future development!

Update 2018:
Guys, if you get the MP4 error JUST WAIT, he is aware if you took 30 seconds to read the main site - stop leaving crap reviews just because you expect everything to work instantly after code changes by YT, grow up and wait ffs!

2017:
So good I paid for it, worth every penny even though I don't need it that often - the Dev is a great guy and fixes issues as soon as he can.
Keep up the good work

This is a fantastic product with fantastic support.
Thank you for creating such a useful plugin.
I use it frequently and it works very well.
Thank you for developing it.

The best add-on for video downloading from YouTube and many other streaming sites. Also, one of the first, if not the first, to fix downloading high-resolution content from YouTube after the lockdown. It's good to see an add-on this useful to receive active development.

On the practicalities: it's easy to use -- if you can click a button and choose a resolution in the menu that pops up, you're good to go. Several options available from the get-go, but some of the higher resolutions (or bitrates in the case of audio downloading) are locked and only available to donators (who then get the Pro Version). The Pro version actually provides good value in the effortless procurement of FullHD (and up, if available) content -- but even if you're content with 720p the Pro donation option makes sense to help out with server cost (which must be immense) and software development. A clear and convinced recommendation by me!

Good Ad on

This is one of the best download add-on. I use it exclusively for youtube and don't bother with anything else. Thank you!

A

Works very well. Does stop working from time to time but Dishta gives a prompt response to help requests.
Works better than any of the other Youtube downloaders that I have tried

Great easy use, good quality downloads.

Seven years later, I am continuing to use the downloader on nearly a daily basis. The need for it now is greater in that it's the only program these days that allows me to make high quality downloads.

I am more than happy with this add-on. Because of changes to Firefox, I was charged $30 in order to continue high definition downloads, which was fine with me. I don't mind supporting excellent software.

I'm continuing to use this software almost every day. There is no other way to reliably download YouTube videos.

the best

Updated May 2024 - Donated again - well worth it. This extension downloads high quality in a manageable file size. Excellent!

I tried the plugin and it worked for low resolution but I wanted high resolution so I went pro and now I have my favorite music videos and some trailers in 1080p! its awesome! I am very happy with it.

Extremely useful, the best Youtube down-loader out there for Firefox. I use it all the time.

Had some issues with the Downloader throughout time. The Develeper corresponded with me to help me through the issue. After trouble off/on for months, the Downloader just stopped all together. At this point, the Delevelper again corresponded with me, this time nightly, till I found the issue with applications on my computer. The Developer has been patient and fairly quick to respond by email. If you are having trouble, don't give up. Contact the Developer. The Video Downloader works well and also downloads MP3's from videos.

Very nice addon. Convenient to use as well. Just two or three clicks and boom your video is downloading. User support was also helpful and prompt when I needed help to resolve a problem.

This addon works perfectly for me.