The downloader stopped working for me, too, but I don't get a "file not available..." message. A dialogue box opens to save the file. The name of the video appears correctly but with a ".txt" extension and the destination is my downloads folder. If I click on save, nothing happens. I have tried changing the extension to "mp4" but again, nothing happens. I click on "Save" and the dialogue box disappears, but nothing appears in my downloads folder. This only started a few days ago and I have tried re-installing the browser, rebooting, etc. to no avail. It has worked perfectly in the past and really appreciated having it.