YouTube deletes views, comments or likes – Why?

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YouTube deletes views, comments, likes and subscribers, but why?

Very often there are questions why a video loses views on YouTube, comments disappear or likes you had are suddenly deleted. Does YouTube delete views? Or are Likes removed from YouTube?

YouTube Strategy: One YouTube channel multiple topics?

ein youtube kanal mehrere themen - youtube niche suchen

Multiple themes on one YouTube channel or would you rather open multiple channels?

Is it possible and advisable to have several themes on one YouTube channel, or would it be better to concentrate on one theme and focus on a niche?