TubeNinja.net might be a bit more popular than Flash Video Downloader. We know about 1 link to it since March 2021 and only 1 link to Flash Video Downloader. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Or, maybe you're talking about this one https://web.archive.org/web/20180511014655/https://addons.opera.com/en/extensions/details/getthemall-any-file-downloader/ that was made by https://everhelper.me/. (Clicking the "add to Opera" link doesn't work unfortunately because the downloaded link itself was never archived). Source: almost 3 years ago
This is how it works on Tubeninja:. Source: over 1 year ago
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