Video providers, like mentioned YouTube, update their sites and pages from time to time and sometimes can these changes influence our video downloader extension in negative way. And it takes some time to fix the extension, to test it and to publish it. Fortunately, you don't have to wait for new extension version since new video downloader version 1.4.259 was just released, so please update the extension and if the problem still persists or if you find another problem, don't hesitate do report it. Thank you for being with us.
Avast Software Tester