Setting Cookies in browser for video autoplay

Question

How would I set cookies such that a video only plays automatically on the first visit only, afterwards if they want to watch it, it must be played manually?

Answer 1

Here's what I used on a project:

if (document.cookie.length == 0 || document.cookie.indexOf("MYCOOKIENAME=") == -1) {
  // I set the path to / so once they'd seen it once on the site they wouldn't
  // see it on other pages.
  document.cookie = "MYCOOKIENAME=true; path=/;";

  // START VIDEO PLAYING HERE.
}

I didn't really want the overhead of adding a cookie library.

Plugging my code into Oliver Moran's HTML gives you: