diff --git a/admin/lesson_create.php b/admin/lesson_create.php
index 0e77250..eb6a14b 100644
--- a/admin/lesson_create.php
+++ b/admin/lesson_create.php
@@ -75,6 +75,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                             unlink($upload_path);
                             $file_name = pathinfo($file_name, PATHINFO_FILENAME) . '.mp4';
                             $upload_path = $converted_path;
+                            $video_converted = true;
                         }
                         // Se la conversione fallisce, usa comunque il file originale
                     }
@@ -83,6 +84,11 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 // Imposta il percorso relativo per il database (senza slash iniziale)
                 $video_url = 'uploads/lessons/' . ($is_demo ? 'demo' : 'pay') . '/' . $file_name;
                 
+                // Se è già MP4, considera già convertito
+                if ($file_extension === 'mp4') {
+                    $video_converted = true;
+                }
+                
                 // Estrai durata automaticamente se non specificata
                 if (empty($duration)) {
                     $duration = get_video_duration($upload_path);
@@ -111,9 +117,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                     title, description, type, video_url, video_platform, 
                     duration, live_platform, live_url, live_date, 
                     level, category, price, is_demo, is_active, 
-                    created_by, created_at
+                    video_converted, created_by, created_at
                 ) VALUES (
-                    ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW()
+                    ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW()
                 )
             ");
             
@@ -132,6 +138,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 $price,
                 $is_demo,
                 $is_active,
+                $video_converted ?? false,
                 $_SESSION['user_id']
             ]);
             
diff --git a/admin/lesson_edit.php b/admin/lesson_edit.php
index e5b51a6..102e924 100644
--- a/admin/lesson_edit.php
+++ b/admin/lesson_edit.php
@@ -104,6 +104,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                             unlink($upload_path);
                             $file_name = pathinfo($file_name, PATHINFO_FILENAME) . '.mp4';
                             $upload_path = $converted_path;
+                            $video_converted = true;
                         }
                         // Se la conversione fallisce, usa comunque il file originale
                     }
@@ -117,6 +118,11 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 // Imposta il nuovo percorso (senza slash iniziale)
                 $video_url = 'uploads/lessons/' . ($is_demo ? 'demo' : 'pay') . '/' . $file_name;
                 
+                // Se è già MP4, considera già convertito
+                if ($file_extension === 'mp4') {
+                    $video_converted = true;
+                }
+                
                 // Estrai durata automaticamente se non specificata
                 if (empty($duration)) {
                     $duration = get_video_duration($upload_path);
@@ -152,6 +158,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                     price = ?, 
                     is_demo = ?, 
                     is_active = ?,
+                    video_converted = ?,
                     updated_at = NOW()
                 WHERE id = ?
             ");
@@ -171,6 +178,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 $price,
                 $is_demo,
                 $is_active,
+                $video_converted ?? $lesson['video_converted'] ?? false,
                 $lesson_id
             ]);
             
diff --git a/convert_videos.php b/convert_videos.php
index 22b5034..7923150 100644
--- a/convert_videos.php
+++ b/convert_videos.php
@@ -20,7 +20,7 @@ $videos = [];
 // Trova tutti i video che potrebbero aver bisogno di conversione
 $pdo = get_db_connection();
 $stmt = $pdo->query("
-    SELECT id, title, video_url, video_platform 
+    SELECT id, title, video_url, video_platform, video_converted 
     FROM lessons 
     WHERE type = 'video' 
     AND video_platform = 'local' 
@@ -96,15 +96,19 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['convert_video'])) {
                         $new_file_path = str_replace('.' . $old_extension, '.' . $new_extension, $input_file);
                         rename($input_file, $new_file_path);
                         
-                        $stmt = $pdo->prepare("UPDATE lessons SET video_url = ? WHERE id = ?");
+                        $stmt = $pdo->prepare("UPDATE lessons SET video_url = ?, video_converted = TRUE WHERE id = ?");
                         $stmt->execute([$new_video_url, $lesson_id]);
+                    } else {
+                        // Aggiorna solo il flag video_converted
+                        $stmt = $pdo->prepare("UPDATE lessons SET video_converted = TRUE WHERE id = ?");
+                        $stmt->execute([$lesson_id]);
                     }
                     
                     $message = "✅ Video convertito con successo! Il file originale è stato salvato come backup.";
                     
                     // Ricarica la lista
                     $stmt = $pdo->query("
-                        SELECT id, title, video_url, video_platform 
+                        SELECT id, title, video_url, video_platform, video_converted 
                         FROM lessons 
                         WHERE type = 'video' 
                         AND video_platform = 'local' 
@@ -200,7 +204,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['convert_video'])) {
                             <th>ID</th>
                             <th>Titolo Lezione</th>
                             <th>Percorso Video</th>
-                            <th>Formato</th>
+                            <th>Formato & Stato</th>
                             <th>Dimensione</th>
                             <th>Azione</th>
                         </tr>
@@ -228,17 +232,24 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['convert_video'])) {
                                     <span class="badge" style="background: <?php echo $extension === 'mp4' ? '#2ecc71' : '#e74c3c'; ?>;">
                                         <?php echo strtoupper($extension); ?>
                                     </span>
+                                    <?php if ($video['video_converted']): ?>
+                                        <span class="badge" style="background: #3498db; margin-left: 5px;">✓ Convertito</span>
+                                    <?php endif; ?>
                                 </td>
                                 <td><?php echo $file_size_mb; ?> MB</td>
                                 <td>
                                     <?php if ($exists && $ffmpeg_available): ?>
-                                        <form method="POST" style="display: inline;" 
-                                              onsubmit="return confirm('Vuoi convertire questo video? Il processo potrebbe richiedere alcuni minuti.');">
-                                            <input type="hidden" name="lesson_id" value="<?php echo $video['id']; ?>">
-                                            <button type="submit" name="convert_video" class="btn btn-primary btn-sm">
-                                                🔄 Converti
-                                            </button>
-                                        </form>
+                                        <?php if ($video['video_converted']): ?>
+                                            <span style="color: #27ae60; font-size: 0.9em;">✓ Già convertito</span>
+                                        <?php else: ?>
+                                            <form method="POST" style="display: inline;" 
+                                                  onsubmit="return confirm('Vuoi convertire questo video? Il processo potrebbe richiedere alcuni minuti.');">
+                                                <input type="hidden" name="lesson_id" value="<?php echo $video['id']; ?>">
+                                                <button type="submit" name="convert_video" class="btn btn-primary btn-sm">
+                                                    🔄 Converti
+                                                </button>
+                                            </form>
+                                        <?php endif; ?>
                                     <?php else: ?>
                                         <span style="color: #999;">Non disponibile</span>
                                     <?php endif; ?>
diff --git a/database/add_video_converted_flag.sql b/database/add_video_converted_flag.sql
new file mode 100644
index 0000000..d6d8f24
--- /dev/null
+++ b/database/add_video_converted_flag.sql
@@ -0,0 +1,23 @@
+-- Aggiungi campo per tracciare conversione video
+-- Esegui questo script per aggiornare il database
+
+USE pilatesplatform;
+
+-- Aggiungi colonna video_converted alla tabella lessons
+ALTER TABLE lessons 
+ADD COLUMN video_converted BOOLEAN DEFAULT FALSE COMMENT 'True se il video è stato convertito in MP4 H.264' 
+AFTER video_platform;
+
+-- Aggiorna i video esistenti come non convertiti (NULL = da verificare)
+UPDATE lessons 
+SET video_converted = FALSE 
+WHERE type = 'video' 
+AND video_platform = 'local' 
+AND video_url IS NOT NULL;
+
+-- Se vuoi marcare i video MP4 esistenti come già convertiti:
+-- UPDATE lessons 
+-- SET video_converted = TRUE 
+-- WHERE type = 'video' 
+-- AND video_platform = 'local' 
+-- AND video_url LIKE '%.mp4';
diff --git a/database/schema.sql b/database/schema.sql
index bf12dbc..7cb180a 100644
--- a/database/schema.sql
+++ b/database/schema.sql
@@ -48,6 +48,7 @@ CREATE TABLE IF NOT EXISTS lessons (
     -- Informazioni video
     video_url VARCHAR(500) DEFAULT NULL COMMENT 'URL video (YouTube, Vimeo, S3, o percorso locale)',
     video_platform VARCHAR(50) DEFAULT 'local' COMMENT 'Piattaforma: local, youtube, vimeo, s3',
+    video_converted BOOLEAN DEFAULT FALSE COMMENT 'True se il video è stato convertito in MP4 H.264',
     thumbnail VARCHAR(500) DEFAULT NULL COMMENT 'URL immagine anteprima',
     duration INT DEFAULT NULL COMMENT 'Durata in minuti',
     
diff --git a/includes/functions.php b/includes/functions.php
index 8c01d21..29aada6 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -471,7 +471,14 @@ function send_smtp_email($to, $subject, $message) {
         if (SMTP_ENCRYPTION === 'tls') {
             $send("STARTTLS");
             $read();
-            stream_socket_enable_crypto($smtp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
+            
+            // Usa una versione più compatibile di TLS
+            $crypto_method = STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT | STREAM_CRYPTO_METHOD_TLSv1_3_CLIENT;
+            if (!stream_socket_enable_crypto($smtp, true, $crypto_method)) {
+                error_log("SMTP Error: Impossibile avviare crittografia TLS");
+                fclose($smtp);
+                return false;
+            }
             
             $send("EHLO " . SMTP_HOST);
             $read();