Update templates/index.html

templates/index.html

@@ -182,12 +182,12 @@
                     responseType: 'blob'
                 },
                 success: function(response) {
-                    const blob = new Blob([response], { type: 'audio/mp3' });
+                    const blob = new Blob([response], { type: 'video/mp4' });
                     const downloadUrl = window.URL.createObjectURL(blob);
                     const a = document.createElement('a');
                     a.style.display = 'none';
                     a.href = downloadUrl;
-                    a.download = $('#videoTitle').text() + '.mp3';
+                    a.download = $('#videoTitle').text() + '.mp4';
                     document.body.appendChild(a);
                     a.click();
                     window.URL.revokeObjectURL(downloadUrl);