Not customizable at all, has a few options and anything over 5x or below 0.25x will work badly. 16x has no audio and 0.1x doesn't play at all. The UI also doesn't feel comfortable and you need to be clicking on it instead of hovering to change, but if you hover, it will pop up.

I don't understand why there is no custom shortcut, it's unusable without them.
The default youtube shortcuts don't work on azerty keyboard.

Seems nice, unfortunatly the shortcuts can't be changed and only work on qwerty layout which make it not usable on lot of foreign keyboards. Could you make the shortcuts customizable ?

Works perfectly, except when it disappears from the YouTube UI, forcing you to either reinstall or disable and then re-enable it to get it back. Please fix!

EXACTLY what i wanted thank you.

It says it supports keyboard shortcuts; however, I see no place where those can be set. And the primary selector (where it says e.g. "2x" between the left arrow and the right arrow) is not able to be selected using vimium.

Es exactamente lo que buscaba e incluso mejor que el que utilizaba antes porque el que utilizaba antes te ponía como una especie de medidor arriba a la derecha pero por ejemplo funcionaba bien en chrome pero no funcionaba para nada bien en firefox y esto es una maravilla porque va perfecto hace lo que tiene que hacer es nativo firefox y va de lujo. Y sin tener que pagar Youtube Premium para mas velocidad.

Amazing, well made and looks like its part of YouTube!

Amazing app, it works just as expected! It's free and open source, the UI is consistent with YouTube and updates seamlessly. When YouTube updated their website to block 4x speed behind premium, Nizioleque updated this addon within just a few days! Amazing maintenance.

Everything is well, except that, unfortunately, it conflicts with YouTube's built-in "Playback speed" function, as well as with other add-ons, e.g., https:// addons.mozilla. org/en-US/firefox/addon/youtube中文配音/, which causes freezes and makes rewinding impossible.

Starting today, for some reason, when I click on a video from a YouTube notification, it no longer works. However, if I go to the same video, but not through the YouTube notification, but within the channel, then it works fine. Or if I just click the channel real quick and then go right back. - This is still exists

Please add "return to 1x" button. maybe put it on shft+/ ?

Keeps disappearing (I'm on latest version 1.10). It's good when it works. Could do with being able to scroll mouse wheel to change speed.

Great design and UI.
However, I'm not sure why, but the extension simply stops working from time to time.
Sometimes it works no problem for a few days.
Sometimes I open a new video and the extension is gone, so I have to deactivate and activate it again... but it's gone by the next video.
Also, deactivating and activating it causes the UI to appear multiple times on videos where the extension was still active (only one works)

YT is flagging this add-on as an Ad Blocker

So I finally found a speed extension that works superbly with customisable speeds and a great keyboard shortcut. Well done on this extention.

Custom default play speed and even custom speed increments, works with the existing youtube keyboard shortcuts.

edit, 22 Oct:
Design update needed since YT recently overhauled their player UI (buttons are now misaligned—but still functional!)
edit, 23 Oct:
All fixed now! Thanks nizioleque! Still the handiest YT addon around!

Works pretty dang seamlessly! Love the ability to add your own custom values, but keyboard shortcuts (rather than single-increment arrows + a clumsy drop-down list, which gets cut off at the top if you have lots of individual speed values) would make this even more intuitive. What's really missing is pitch control—all the other add-ons that manipulate pitch have clunky UI or fussy functionality. Regardless, this here's the best speed control add-on I've yet to come across.

I appreciate this extension, but please add the ability to create keyboard shortcuts for adjusting speed! I would really like the ability to use "+" and "-" to adjust instead of being stuck using the default controls.

EDIT 8/11/2025: Speed control on the video player is no longer aligned with the new YouTube player design.