Subscriptions feed

Where viewers find it: the Subscriptions tab in the app and on the web. In Studio it shows up as a sub-source under Browse features in the traffic source report. Because no personalised ranking stands between your upload and the people who chose to follow you, that feed reaches them regardless of how the wider recommendation system is treating the video. That makes it the cleanest test bed a creator has. Compare a new video's click-through rate in the Subscriptions row against the last one, and a drop points at the title, the thumbnail or the video itself. It is still not a delivery guarantee, since a subscriber has to open the tab for any of it to matter.