Vimeo error after going back page

Question

I'm having an strange problem after entering a project and going back to the home.

Here is the home. It works well when you open it but if you click for example on first project and then go back, the page loads all videos the same:

If I check the console this is the error I'm getting: Failed to load resource: net::ERR_CACHE_MISS http://player.vimeo.com/video/9956698?title=0&byline=0&portrait=0

This is the loop:

<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
        <div class="post_image">
            <?php $_video_type = get_post_meta(get_the_ID(), "video_format_choose", true);?>
            <?php if($_video_type == "youtube") { ?>
                <iframe src="http://www.youtube.com/embed/<?php echo get_post_meta(get_the_ID(), "video_format_link", true);  ?>?wmode=transparent" wmode="Opaque" frameborder="0" allowfullscreen></iframe>
            <?php } elseif ($_video_type == "vimeo"){ ?>
                <iframe src="http://player.vimeo.com/video/<?php echo get_post_meta(get_the_ID(), "video_format_link", true);  ?>?title=0&amp;byline=0&amp;portrait=0" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>
            <?php } elseif ($_video_type == "self"){ ?> 
                <div class="video"> 
                <div class="mobile-video-image" style="background-image: url(<?php echo get_post_meta(get_the_ID(), "video_format_image", true);  ?>);"></div> 
                <div class="video-wrap"  > 
                    <video class="video" poster="<?php echo get_post_meta(get_the_ID(), "video_format_image", true);  ?>" preload="auto"> 
                        <?php if(get_post_meta(get_the_ID(), "video_format_webm", true) != "") { ?> <source type="video/webm" src="<?php echo get_post_meta(get_the_ID(), "video_format_webm", true);  ?>"> <?php } ?> 
                        <?php if(get_post_meta(get_the_ID(), "video_format_mp4", true) != "") { ?> <source type="video/mp4" src="<?php echo get_post_meta(get_the_ID(), "video_format_mp4", true);  ?>"> <?php } ?> 
                        <?php if(get_post_meta(get_the_ID(), "video_format_ogv", true) != "") { ?> <source type="video/ogg" src="<?php echo get_post_meta(get_the_ID(), "video_format_ogv", true);  ?>"> <?php } ?> 
                        <object width="320" height="240" type="application/x-shockwave-flash" data="<?php echo get_template_directory_uri(); ?>/js/flashmediaelement.swf"> 
                            <param name="movie" value="<?php echo get_template_directory_uri(); ?>/js/flashmediaelement.swf" /> 
                            <param name="flashvars" value="controls=true&file=<?php echo get_post_meta(get_the_ID(), "video_format_mp4", true);  ?>" /> 
                            <img src="<?php echo get_post_meta(get_the_ID(), "video_format_image", true);  ?>" width="1920" height="800" title="No video playback capabilities" alt="Video thumb" /> 
                        </object> 
                    </video>   
                </div></div> 
            <?php } ?>
        </div>
</article>

What could be the problem here?