Thank you for reaching out. You'll have to manually to go the channel and check if they have notification enabled. Please share your thoughts by sending a feedback report by following these steps: https://yt.be/help/VdnK
@TeamYouTube is there anyway to see what YouTubers I have notifications on for? my friend was on my computer and turned on notifications for like 50 people and I want to fix it 
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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