Per-tab counts come from YouTube's public statistics. Only Videos and Playlists have exact public totals. Shorts is estimated from the most recent 25 uploads. Live, Podcasts, Courses, Posts and Store are shown when the tab exists β YouTube does not publish a public count for those.
YouTube only publishes exact public totals for Videos and Playlists. For Shorts we estimate from the latest 25 uploads. For Live, Podcasts, Courses, Posts and Store there is no public count β we surface the tab when it exists so you can open it on YouTube.