This might happen if you're using a shared device. We'd recommend adding extra layers of security to your account with these tips: https://goo.gl/8ahrLA . Let us know if that helps.
@TeamYouTube there is a hacker watching videos on my channel. Cause there are videos I didn’t watch that are on my channel for some reason.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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