Inside Support For Updates To EXT-X-DATERANGE (like

The HLS Pantos spec lets EXT-X-DATERANGE tags support layered timing data - critical for syncing early-returns in live streams. When a break ends early, augmenting the first DATERANGE with a new X-PLAYOUT-LIMIT lets interstitials halt cleanly at a set duration, avoiding overshoot and preserving viewer flow. For example, a 30-second interstitial might cut to 12 seconds mid-play if triggered - managed via `#EXT-X-DATERANGE:ID=