title: How to animate scanner effect line with canvas
body: <p>Is it possible to animate scanner effect with html5 canvas, to move glowing line up and down?</p>
  
  <p><a href="https://www.youtube.com/watch?v=6V31CVYQYrk" rel="nofollow noreferrer">Effect example.</a></p>
  
  <p>I want to use this effect on my html5 video window. If it is possible could you share code example or place where I have to start?</p>