While we can't get into the specifics. Here's an Help Center article that may help you gain more insight: https://goo.gl/Av9ssr . Hope this helps.
@TeamYouTube why does my first video have wayyyy more impressions than my other videos?pic.twitter.com/nKhQUAoAOw
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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