Google has temporarily disabled YouTube's SRV3 caption format without warning, leaving creators unable to upload new videos with the custom subtitle style. The company confirmed it's not ending support but limited serving due to a playback bug affecting some users. Most videos using standard caption formats remain unaffected.

SRV3, also known as YouTube Timed Text, launched in 2018, giving creators precise control over caption styling—colors, fonts, animations, and positioning. This feature became essential for channels producing multi-speaker content, sing-alongs, or stylistic overlays. Its sudden disappearance sparked concern that Google might abandon the format entirely.

Google's vague statement suggests the change is temporary for "almost" all videos, implying some SRV3 features may not return. Without a timeline, affected creators face recreating captions in less capable formats or relying on AI-generated alternatives. The incident highlights Google's inconsistent documentation and support for its own creator tools.