Youtube New Layout Rated 4 out of 5 stars
It seems the functionality of the download button is no longer working recently because youtube changed their layout which is probably what the plugin looks for to decide where to place the download button.
I have used this without issue for a long time and I am sure the developer will confirm with us that he is looking into it and provide us an update soon.
I've seen at least two YouTube experiments this week and the extension still works well. Can you send more details about the new interface and how this affects the extension at firstname.lastname@example.org ? A screenshot would also be useful. Thanks.