PHP-Videoplayer

<?php
$Video_File = "C:\Users\Sheeraz\OneDrive\Desktop\New folder\sample.ogv";

if(!file_exists($Video_File)) return;

$File_Open = @fopen($Video_File, 'rb');
$File_Size   = filesize($Video_File); //  size of the video file
$Video_Length = $File_Size;           // length of the video
$Video_Start  = 0;               // The start byte
$Video_End    = $File_Size - 1;       // The end byte
header('Content-type: video/mp4');
header("Accept-Ranges: 0-$Video_Length");
header("Accept-Ranges: bytes");
if (isset($_SERVER['HTTP_RANGE'])) {
    $V_Start = $Video_Start;
    $V_End   = $Video_End;
    list(, $Video_Range) = explode('=', $_SERVER['HTTP_RANGE'], 2);
    if (strpos($Video_Range, ',') !== false) {
        header('HTTP/1.1 416 Requested Video Range Not Satisfiable');
        header("Content-Range: bytes $Video_Start-$Video_End/$File_Size");
        exit;
    }
    if ($Video_Range == '-') {
       $V_Start = $File_Size - substr($Video_Range, 1);
    }else{
        $Video_Range  = explode('-', $Video_Range);
        $V_Start = $Video_Range[0];
        $V_End   = (isset($Video_Range[1]) && is_numeric($Video_Range[1])) ? $Video_Range[1] : $File_Size;
    }
    $V_End = ($V_End > $Video_End) ? $Video_End : $V_End;
    if ($V_Start > $V_End || $V_Start > $File_Size - 1 || $V_End >= $File_Size) {
        header('HTTP/1.1 416 Requested Video Range Not Satisfiable');
        header("Content-Range: bytes $Video_Start-$Video_End/$File_Size");
        exit;
    }
    $Video_Start  = $V_Start;
    $Video_End    = $V_End;
    $Video_Length = $Video_End - $Video_Start + 1;
    fseek($File_Open, $Video_Start);
    header('HTTP/1.1 206 Partial Video Content');
}
header("Content-Range: bytes $Video_Start-$Video_End/$File_Size");
header("Content-Length: ".$Video_Length);
$buffer = 1024 * 8;
while(!feof($File_Open) && ($p = ftell($File_Open)) <= $Video_End) {
    if ($p + $buffer > $Video_End) {
        $buffer = $Video_End - $p + 1;
    }
    set_time_limit(0);
    echo fread($File_Open, $buffer);
    ob_flush();
}
fclose($File_Open);
exit();
?>