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Switching to yt-dlp might be difficult if you are not accustomed to using and configuring a command-line, but if you can invest the time, yt-dlp is highly configurable and can solve many issues like what you describe.
For finding already existing duplicates that vary in size, czkawka has a pretty good "Similar Videos" feature that also finds duplicates by the content of the video, not just by filename or filesize.
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Hence, a higher number means a more popular project.