message: added title to iframes
  to let users know what kind of play button they are on. Will add images to pr
diff: frameborder='0'
  allowfullscreen
  allow="autoplay"
  + title="about video"
  )
  .HomeHero__cta
  a.Button.Button--size-lg.Button--border-heavy( class=button_class href='/sign_up' )
  frameborder='0'
  allowfullscreen
  allow="autoplay"
  + title="about video"
  )
  