-Implemented YouTube timestamp correction and added the admin Upkeeping section.

What changed:
Added shared YouTube publish-date scraping helpers in 
[includes/db.php](/Users/tyemeclifford/Documents/GH/mediaplayer/includes/db.php).
New YouTube imports now set videos.created_at to the original YouTube 
publish date when available.
Manual Add/Edit saves now also try to correct timestamps for 
YouTube-backed videos.
Added Admin Dashboard → Upkeeping → Correct YouTube timestamps in 
[admin/index.php](/Users/tyemeclifford/Documents/GH/mediaplayer/admin/index.php), 
with batch size control for backfilling existing records.
Renamed the admin table column from Added to Date, since it may now 
reflect original publish date.
Documented the behavior in 
[README.md](/Users/tyemeclifford/Documents/GH/mediaplayer/README.md).

admin/index.php

@@ -39,6 +39,16 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         $db->prepare("UPDATE videos SET published=? WHERE id=?")->execute([$cur ? 0 : 1, $id]);
         $msg = 'Video ' . ($cur ? 'unpublished' : 'published') . '.';
     }
+
+    if ($action === 'correct_youtube_timestamps') {
+        $limit = max(1, min(100, (int)($_POST['timestamp_limit'] ?? 25)));
+        $result = media_correct_youtube_timestamps($limit);
+        $msg = 'Upkeeping checked ' . $result['checked'] . ' YouTube video' . ($result['checked'] === 1 ? '' : 's') . ': ';
+        $msg .= $result['corrected'] . ' corrected';
+        if ($result['already_correct']) $msg .= ', ' . $result['already_correct'] . ' already correct';
+        if ($result['not_found']) $msg .= ', ' . $result['not_found'] . ' without a readable original date';
+        $msg .= '.';
+    }
 }
 
 // Search + pagination
@@ -73,6 +83,7 @@ $list_stmt->bindValue(':limit',  $per_page, PDO::PARAM_INT);
 $list_stmt->bindValue(':offset', $offset,   PDO::PARAM_INT);
 $list_stmt->execute();
 $videos = $list_stmt->fetchAll();
+$youtube_timestamp_candidates = media_youtube_timestamp_candidate_count();
 
 $qs = fn($p) => '?' . http_build_query(array_filter(['q' => $search, 'page' => $p]));
 
@@ -130,6 +141,12 @@ render_head('Admin — TyClifford.com', '
 
   .admin-footer-bar { display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; }
   .rec-count { font-family:"Share Tech Mono",monospace; font-size:.63rem; color:var(--text-3); letter-spacing:.06em; }
+  .section-heading { font-family:"Share Tech Mono",monospace; font-size:.65rem; letter-spacing:.15em; text-transform:uppercase; color:var(--text-3); margin-bottom:.75rem; }
+  .hint { font-size:.72rem; color:var(--text-3); margin-top:.2rem; line-height:1.5; }
+  .upkeep-row { display:flex; align-items:flex-end; justify-content:space-between; gap:1rem; flex-wrap:wrap; }
+  .upkeep-copy { max-width:620px; }
+  .upkeep-form { display:flex; align-items:flex-end; gap:.65rem; flex-wrap:wrap; }
+  .upkeep-form .form-group { min-width:120px; }
 ');
 ?>
 <main class="page" role="main">
@@ -183,6 +200,29 @@ render_head('Admin — TyClifford.com', '
     <!-- Main content -->
     <div class="admin-main">
 
+      <div class="card">
+        <p class="section-heading">Upkeeping</p>
+        <div class="upkeep-row">
+          <div class="upkeep-copy">
+            <h2 class="card-title">Correct YouTube timestamps</h2>
+            <p class="hint">
+              Fetches original YouTube publish dates and updates the database timestamp shown in the admin list and public catalogue.
+              <?= $youtube_timestamp_candidates ?> YouTube-backed video<?= $youtube_timestamp_candidates === 1 ? '' : 's' ?> currently match this upkeep task.
+            </p>
+          </div>
+          <form class="upkeep-form" method="post" action="index.php">
+            <input type="hidden" name="action" value="correct_youtube_timestamps">
+            <div class="form-group">
+              <label class="form-label" for="timestamp_limit">Batch Size</label>
+              <input class="form-input" type="number" id="timestamp_limit" name="timestamp_limit" value="25" min="1" max="100">
+            </div>
+            <button class="btn btn-secondary btn-sm" type="submit">
+              Correct Dates
+            </button>
+          </form>
+        </div>
+      </div>
+
       <div class="admin-toolbar">
         <form class="search-form" method="get" action="index.php">
           <input class="form-input" type="search" name="q"
@@ -214,7 +254,7 @@ render_head('Admin — TyClifford.com', '
               <th>Duration</th>
               <th>Sources</th>
               <th>Status</th>
-              <th>Added</th>
+              <th>Date</th>
               <th class="actions-cell">Actions</th>
             </tr>
           </thead>