video_field.php

<?php
// Check if actual video data is there
if(isset($video_data['video_id'])) {

  # We have to manually define our embed code, as the players and module
  # are not consistent enough to access with a single variable set/call
  $video_embed = "http://player.vimeo.com/video/" . $video_data['video_id'] . "?html5=1&autoplay=1&badge=0&byline=0&title=0&api=1";

  # We are going to use Javascript and CSS to do all of the fancy video
  # showing/hiding - CSS contains all of the active styles
  print '<a class="video-button" data-video="' . $video_embed . '" data-source="' . $video_data['handler'] . '">Play Video</a>';
}