YouTube has replaced the single returning viewers metric with three audience segments: new viewers, casual viewers and regular viewers. Casual viewers watched in one to five months out of the past twelve; regular viewers returned in six or more months. The segmentation has rolled out globally on desktop and mobile in the Studio Audience tab.

The change trades a binary classification for a loyalty gradient. YouTube has cautioned that a channel’s regular viewer count can look like a drop against the old returning viewers figure, because the definition is stricter rather than because the audience was lost. A viewer who watched in four scattered months used to count as returning; now they are casual.

Alongside the segmentation, YouTube added a Unique Reach metric in Advanced Analytics, announced via the Creator Insider channel on May 22, 2026. It estimates individual viewers while accounting for co-viewing on TV devices, where several people watch one screen under one account. A Co-Viewed metric in the Audience tab serves a similar purpose. Both address the gap between account-level data and living-room reality, and both give creators a more commercially usable audience estimate for brand negotiations.

The takeaway is to re-anchor loyalty goals to the regular viewer segment. Track the share of regulars month over month as the core community health metric, treat growth in casual viewers as the top-of-funnel pipeline, and bring Unique Reach numbers into sponsorship decks where TV viewing is significant. The old returning-viewer benchmark is retired; the new segments reward channels that convert samplers into regulars.