Dear Team savefrom,
the issue reported below was fixed with the latest stable release of Opera v63.0.3368.43.
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thank you for getting back to me so quickly.
When running Opera v63.0.3368.35 64-bit on Windows 10 64-bit and visiting youtube.com, your plugin does not provide any download options when clicking on the savefrom.net download button which is located under the video area. The dropdown list only shows the initial entry "Download ...", but it does not get filled with the usual entries for video and audio files.
Please note the the issue is most probably related to Opera, as I learned later on that most of my installed plugins stopped to work. After reverting back to Opera v62.0.3331.116 all plugins worked normally again, including "savefrom.net helper".
I already posted a report at the related site at Operas blogs (https://blogs.opera.com/desktop/2019/08/opera-63-initial-release/).