Include video in HTML

I want to include a video for my website which is locally available in my C drive. But after I have done the website only plays audio. If I add a thumbnail only that image is shown. My code

<!DOCTYPE html>
<html>
    <head>
      <meta charset ="UTF-8">
      <meta name ="description" content="It is nice website">
      <title>Ajay Web</title>
    </head>
    <body>
      <video src="C:\Users\ajayr\Downloads\[TIF]_S04_E16_The_Big_Bang_Theory_720p_10bit.mkv"  controls></video>
      
     
    </body>
</html>