Sign in to YouTube Studio
Go to your channel dashboard
Select “Analytics” from the left menu
Click “Subscribers”
View subscriber count and subscriber changes over time
To see subscriber sources, open “Subscribers” in Analytics and check the “Traffic source”/“Where your viewers come from” sections
To see subscriber details by video, open “Content” in Analytics, select a video, then review the “Subscribers”/“Audience” related metrics
To see subscriber changes in real time, use the “Real-time” section in Analytics
To see who subscribed (individual names), use the “Subscribers” list in YouTube Studio only if it’s available for your account settings/permissions