Justo ahora veo este mensaje en youtube:
The view count shown on your YouTube channel now includes only views from public videos. To include views from private or unlisted videos, change them to 'public'. YouTube Analytics channel view counts will continue to include views from all videos that were public at the time the view occurred even if the videos are now private, unlisted, or deleted.
O lo que es lo mismo, si borras un vídeo o lo pones en privado, las reproducciones del canal bajan. Aunque en youtube analytics, las estadísticas de esos vídeos se mantienen.