There is a gap between the image and embedded video.There is no problem in mobile view.
<div class="section">
<div class="container-fluid">
<div class="row">
<div class="col-sm-6"><div class="embed-responsive embed-responsive-16by9">
<img class="embed-responsive-item" width="600px" height="360" src="images\phone.jpg"/> </div>
</div>
<div class="col-sm-6">
<div class="embed-responsive embed-responsive-16by9"><iframe width="560" height="315" class="embed-responsive-item" src="https://www.youtube.com/embed/_k4SA"></iframe>
</div>
</div>
</div>
</div>
</div>