Sometimes it works and sometimes it doesn't. Not sure why. Does anyone know of a good alternative?

Great add-on but do wish there was a option to not play the video and only play the audio :)

doesn't work well anymore and no more update from the dev..

Amazingly amazing

App does what you said

Works very well on Firefox ! On chrome, it has some issues with the 'Expand' button

impressive list of customizations here

Abandoned by developer

Youtube Web'e güzel özellikler katıyor. Tavsiyedir.