How do you embed vine videos?

Try this:  
<video id=”video” autoplay=”autoplay” loop=”” preload=”auto” width=”679″ height=”679″>

<source src=”https://mtc.cdn.vine.co/r/videos/EAD9F02F851045869274809446400_1d985e60e6c.4.7.10427178051718318546.mp4?versionId=2.fQQws9P_GhLHRj6JdTGl7hEQ7hBr7K&#8221; type=”video/mp4″>
</video>
 
Hope this helps!

Hi Sammy!
Please try our solution here:
1. Log in to Dashboard  > Appearance > Customize > Custom Code, add the following code to the “Header Code” section.

 <style>
.masonry .format-video .item-content iframe, .masonry .format-video .item-content embed {
    display: block;
}
</style>

 – Add the following code to the “Footer code” section:

  <script>
jQuery(function($){
 function responsiveIframe() {
   $('iframe').each(function(){
       if ( ! $(this).hasClass('twitter-tweet') ) {
           var iw = $(this).attr('width');
           var ih = $(this).attr('height');
           var ip = $(this).parent().width();
           var ipw = ip/iw;
           var ipwh = ih*ipw; 
           $(this).css({
               'width': ip,
               'height' : ipwh,
           });
       }
   });
 }

 $(document).ready(function(){
  responsiveIframe();
 });

 $(window).resize(function(){
  setTimeout(function(){
   responsiveIframe();
  },500);
 });
 $('.masonry').masonry('reload',function(){
  setTimeout(function(){
   responsiveIframe();
  },500);
 });
});
</script>

2. Open the functions.php file. Find the line 660 & line 661. Replace the following code:

 add_filter('the_excerpt', 'wallpress_strip_tags');
add_filter('the_content', 'wallpress_strip_tags');

With new code:

 //add_filter('the_excerpt', 'wallpress_strip_tags');
//add_filter('the_content', 'wallpress_strip_tags');

Hope this helps !

Hello Hannah !
To display a video on the homepage of Wallpress theme. Please do as the following: 
Step1: You can copy the Embed code on the Youtube
See the screenshot:
or use your code:

<iframe class="vine-embed" src="https://vine.co/v/M7hEV9IMI09/embed/simple" width="600" height="600" frameborder="0"></iframe><script async src="//platform.vine.co/static/scripts/embed.js" charset="utf-8"></script>

Step2:  log in to Dashboard > Posts > Add new, paste the Embed code into the “Text” frame.
See the screenshot:   Step3:   In the Format pane on the right hand side, select the Video. See the screenshot:
If you still face the issue, You can send me username & password of your site (via private answer) for further checking.
Hope this helps !