[php] Upload video files via PHP and save them in appropriate folder and have a database entry

PHP file (name is upload.php)    

<?php
    // =============  File Upload Code d  ===========================================
    $target_dir = "uploaded/";

    $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

    // Check if file already exists
    if (file_exists($target_file)) {
        echo "Sorry, file already exists.";
        $uploadOk = 0;
    }

     // Check file size -- Kept for 500Mb
    if ($_FILES["fileToUpload"]["size"] > 500000000) {
        echo "Sorry, your file is too large.";
        $uploadOk = 0;
    }

    // Allow certain file formats
    if($imageFileType != "wmv" && $imageFileType != "mp4" && $imageFileType != "avi" && $imageFileType != "MP4") {
        echo "Sorry, only wmv, mp4 & avi files are allowed.";
        $uploadOk = 0;
    }

    // Check if $uploadOk is set to 0 by an error
    if ($uploadOk == 0) {
        echo "Sorry, your file was not uploaded.";
    // if everything is ok, try to upload file
    } else {
        if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
            echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    }
    // ===============================================  File Upload Code u  ==========================================================


    // =============  Connectivity for DATABASE d ===================================
    $servername = "localhost";
    $username = "root";
    $password = "";
    $dbname = "test";

    // Create connection
    $conn = new mysqli($servername, $username, $password, $dbname);
    // Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } 
    else

    $vidname = $_FILES["fileToUpload"]["name"] . "";
    $vidsize = $_FILES["fileToUpload"]["size"] . "";
    $vidtype = $_FILES["fileToUpload"]["type"] . "";

    $sql = "INSERT INTO videos (name, size, type) VALUES ('$vidname','$vidsize','$vidtype')";

    if ($conn->query($sql) === TRUE) {} 
    else {
        echo "Error: " . $sql . "<br>" . $conn->error;
        }

    $conn->close();
    // =============  Connectivity for DATABASE u ===================================

    ?>