Greasy Fork is available in English.
Download YouTube videos. Video formats are listed at the top of the watch page. Video links are tagged so that they can be downloaded easily.
It works for me on Firefox 43.0.2. You might want to disable some other scripts and try again.
Sorry for the late feedback. I realized I had disabled YouTube cookies on Firefox. I enabled cookies and the script started working again.
No links with Firefox 43.0.1
Hi guys:
I upgraded my browser to Firefox 43.0.1 and I noticed that the links that used to appear over the video are no longer showing up. I'm not sure if this bug is related to firefox, greasemonkey (3.6) or Youtube. Be aware that I'm using v1.9 of the script. Could you please check if you have the same issue? Regarding the other userscripts, Youtube links used to work until a couple days ago.
http://i.imgur.com/NugosB6.jpg