I'v tried really a lot of solutions, and the one that works, it works half a way.
Inside single.php I'v added
<?php while ( have_posts() ) : the_post(); ?>
<?php if( has_post_format('video')) {
get_template_part( 'template-parts/content', 'video'); } ?>
Then i created content-video.php. Now the thing is it appears as it should but since it's called inside single.php for some reason the function doesnt stop, like, if it has format video show the post trough content-video.php only, if the post it's not video post format run a normal post (single.php).
A reason why i want to do this, is that i want to style differently video post formats. So what do I currently have? I have the one i want (video post format) but below it's again the whole single.php stuff. So again the post, the image, the title, the sidebar.
I guess i only need to stop the loop in single if it has post format video, but cant figure/see a way.
My single.php it's here http://pastebin.com/XwqiZrEd
So what I'm missing, because in 4am i am missing something for sure :D ?