AWS Elemental MediaTailor now supports Low-Latency HLS ad insertion

AWS Elemental MediaTailor has introduced support for Low-Latency HTTP Live Streaming (LL-HLS) ad insertion using HLS Interstitials, expanding its capabilities for video providers. The service now allows ads to be inserted into low-latency live streams while maintaining the reduced latency expected by viewers. This feature leverages LL-HLS, which delivers partial segments and keeps playlist requests open until the next segment is ready, enabling cacheable media playlists at the CDN edge.

MediaTailor implements this through HLS Interstitials, which reference ads as separate playlists rather than embedding them directly into each viewer's media playlist. This approach ensures every viewer receives the same cacheable playlist, sustaining low-latency playback at scale. Additionally, it moves ad decision server calls off the manifest request path, improving efficiency and scalability for live content delivery.

The capability has been validated in production environments during live sporting events with multi-million views, demonstrating its reliability under high-demand scenarios. This makes it particularly suitable for formats where low latency is critical, including live sports, news broadcasts, betting and wagering, watch parties, and interactive live formats.

The new feature is available in all AWS Regions where AWS Elemental MediaTailor is offered. Video providers can access this functionality through the MediaTailor console, with additional details available on the product page and server-guided ad insertion documentation.