Having the Same Problem As Others Rated 1 out of 5 stars

DownloadHelper has downloaded videos from YouTube perfectly for me for years until today (August 6). Other users note the same problem (0 byte downloads). Has something gone wrong suddenly? Or is this an ongoing problem that has just occurred to my add-on today? How to solve it?

This review is for a previous version of the add-on (4.9.9).