$sql = "SELECT * FROM `video`";
$list = $db->query($sql);
print_r($list);
mysqli_result Object
(
[current_field] => 0
[field_count] => 6
[lengths] => Array
(
[0] => 1
[1] => 0
[2] => 64
[3] => 33
[4] => 93
[5] => 0
)
[num_rows] => 10
[type] => 0
)