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After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Think of it as an "viral campaign". It's not your "fault" that your video is embedded on more then one websites.
On the other hand, at this time, the search engine can not read "information" in a video. So in any case there can be no duplicate content.