diff --git a/README.md b/README.md
index c13cee2..817af72 100644
--- a/README.md
+++ b/README.md
@@ -117,6 +117,9 @@ Being a streamer = being in the Authentik **streamers** group (a Discord role vi
 There are no stream passwords or keys to hand out: the dock mints a **12-hour publish token** for the
 logged-in Discord user each time Go Live is pressed and sets it as the OBS stream key itself.
 
+OBS → Settings → Output → Encoder: **B-frames = 0** (NVENC "Max B-frames: 0"; x264 add `bframes=0`). MediaMTX
+refuses WebRTC playback of H.264 with B-frames ("WebRTC doesn't support H264 streams with B-frames"), so the live
+portal would fall back to HLS with seconds of delay. Keyframe interval 2 s. Recording quality is unaffected.
 OBS → Tools → WebSocket Server Settings → enable, set a password.
 OBS → Docks → Custom Browser Docks → `https://live.BASE/dock/` → log in with Discord once.
 In the dock's Settings: ingest host (prefilled), OBS WebSocket password/port, optional title prefix/suffix
diff --git a/about/index.html b/about/index.html
index f66d8d9..758e764 100644
--- a/about/index.html
+++ b/about/index.html
@@ -54,6 +54,7 @@
       <ol>
         <li>OBS → Tools → WebSocket Server Settings → enable, set a password.</li>
         <li>OBS → Docks → Custom Browser Docks → add <code id="dockurl">…/dock/</code>; log in with Discord inside the dock.</li>
+        <li>OBS → Settings → Output → encoder <b>B-frames: 0</b> (NVENC "Max B-frames"). With B-frames the live page cannot play you over WebRTC and falls back to a delayed HLS view.</li>
         <li>Dock → Settings: OBS WebSocket password (the rest is prefilled). Optional title prefix/suffix (<code>{date}</code> = today).</li>
         <li>Dock → Timecode band → <b>Add band + clock source</b> while not streaming (gives editors a frame-accurate timecode).</li>
         <li>Per stream: type a title, <b>Go Live</b>. The dock mints a 12-hour token and sets your stream key itself.</li>