diff --git a/scripts/backfill_uuid_filenames.mjs b/scripts/backfill_uuid_filenames.mjs
index 1256ac1..ad72faf 100644
--- a/scripts/backfill_uuid_filenames.mjs
+++ b/scripts/backfill_uuid_filenames.mjs
@@ -83,7 +83,7 @@ async function run() {
 
   // 1. Process items
   console.log('[BACKFILL] Fetching items to process...');
-  const items = await db`SELECT id, dest FROM items`;
+  const items = await db`SELECT id, dest, mime FROM items`;
   console.log(`[BACKFILL] Found ${items.length} items in DB.`);
 
   let itemsProcessed = 0;
@@ -93,6 +93,11 @@ async function run() {
     if (limit && itemsProcessed >= limit) break;
     itemsProcessed++;
 
+    // YouTube embeds store dest as "yt:VIDEO_ID" — not a real file, skip entirely
+    if (item.mime === 'video/youtube') {
+      continue;
+    }
+
     const ext = path.extname(item.dest);
     const base = path.basename(item.dest, ext);
 
diff --git a/scripts/fix_youtube_dest.mjs b/scripts/fix_youtube_dest.mjs
new file mode 100644
index 0000000..2c4dd70
--- /dev/null
+++ b/scripts/fix_youtube_dest.mjs
@@ -0,0 +1,83 @@
+/**
+ * fix_youtube_dest.mjs
+ *
+ * One-time fix: the backfill_uuid_filenames.mjs script failed to exclude
+ * YouTube items, which store dest as "yt:VIDEO_ID" rather than a real file.
+ * As a result, those dest values were replaced with random UUIDs, breaking
+ * embed URLs like youtube.com/embed/<uuid>.
+ *
+ * This script:
+ *   1. Finds all items with mime = 'video/youtube'
+ *   2. For each, re-extracts the video ID from the src column
+ *      (src holds the original YouTube watch URL: https://www.youtube.com/watch?v=VIDEO_ID)
+ *   3. Restores dest to "yt:VIDEO_ID"
+ *
+ * Usage:
+ *   node scripts/fix_youtube_dest.mjs           # live run
+ *   node scripts/fix_youtube_dest.mjs --dry-run  # preview only, no DB changes
+ */
+
+import db from '../src/inc/sql.mjs';
+
+const isDryRun = process.argv.includes('--dry-run');
+
+const ytRegex = /(?:youtube\.com\/\S*(?:(?:\/e(?:mbed))?\/|watch\/?\/?\?(?:\S*?&?v=))|youtu\.be\/)([a-zA-Z0-9_-]{6,11})/i;
+
+async function run() {
+  console.log(`[FIX-YT-DEST] Starting${isDryRun ? ' (DRY RUN)' : ''}...`);
+
+  const rows = await db`
+    SELECT id, dest, src
+    FROM items
+    WHERE mime = 'video/youtube'
+    ORDER BY id
+  `;
+
+  console.log(`[FIX-YT-DEST] Found ${rows.length} YouTube item(s) to check.`);
+
+  let fixed = 0;
+  let skipped = 0;
+  let failed = 0;
+
+  for (const row of rows) {
+    // Already correct format
+    if (row.dest && row.dest.startsWith('yt:')) {
+      skipped++;
+      continue;
+    }
+
+    // Try to extract video ID from src URL
+    const match = row.src && row.src.match(ytRegex);
+    if (!match) {
+      console.warn(`[FIX-YT-DEST] [WARN] Item ${row.id}: cannot extract video ID from src="${row.src}", dest="${row.dest}" — skipping`);
+      failed++;
+      continue;
+    }
+
+    const videoId = match[1];
+    const newDest = `yt:${videoId}`;
+
+    console.log(`[FIX-YT-DEST] Item ${row.id}: "${row.dest}" → "${newDest}" (src: ${row.src})`);
+
+    if (!isDryRun) {
+      await db`UPDATE items SET dest = ${newDest} WHERE id = ${row.id}`;
+    }
+    fixed++;
+  }
+
+  console.log(`\n[FIX-YT-DEST] Done.`);
+  console.log(`  Fixed:   ${fixed}`);
+  console.log(`  Skipped: ${skipped} (already correct)`);
+  console.log(`  Failed:  ${failed} (no video ID recoverable from src)`);
+
+  if (isDryRun) {
+    console.log('\n[FIX-YT-DEST] DRY RUN — no changes were written to the database.');
+  }
+
+  process.exit(0);
+}
+
+run().catch(err => {
+  console.error('[FIX-YT-DEST] Fatal error:', err);
+  process.exit(1);
+});