Index: src/config/database.js
===================================================================
--- src/config/database.js	(revision 88d7c8fc087ab49a2fd3ee63bf184d15d1f0fa31)
+++ src/config/database.js	(revision c8e03c6553401711c2e513b26dd53e24cc5a9486)
@@ -137,4 +137,9 @@
   // never even receives the thumbnail it is not allowed to see.
   ensureColumn('sites', 'external_embeds', 'INTEGER');
+  // The heavier sibling (FEP-633c 5.6): may a player from outside this app run
+  // INSIDE it? A preview is a picture; playback hands the screen to a third
+  // party's engine, recommendations and all. Two settings, so the guardians can
+  // allow the one without the other. NULL = auto, which means off for a ward.
+  ensureColumn('sites', 'external_playback', 'INTEGER');
   ensureColumn('sites', 'og_theme', 'TEXT');             // OG share-card variant: NULL=auto (follow site theme) | 'light' | 'dark'