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@@ -3352,6 +3352,13 @@ any LAN renderer can play; the relay is device-agnostic. Chromecast discovery an
control ship. DLNA/UPnP is designed and not built: it is a second device backend
beside the first, not a second relay.
+**Discovery lists receivers as they answer.** The mDNS scan runs six seconds,
+because a receiver coming back from a reset can take that long, but most answer
+within two. The main process holds what the scan has found and the page polls it
+(`cast:scan`, then `cast:devices`) for as long as the picker is open, rather than
+waiting on one call for the whole scan; a poll uses the same checked `handle()`
+door as every other call, where a pushed event would be a second one.
+
**Subtitles are rebased onto the relay's clock before they are sent.** The node
extracts a track whole, so its cues carry the film's timeline, and the player
can use them unchanged because its SourceBuffer is given `timestampOffset =