How to set up a echo? [closed]

You can use get_post_type() function and pass current post id to it.

global $post;
if(get_post_type($post->ID) == 'videos')
{
    // do this
}

Update

<?php 
global $post;
if(get_post_type($post->ID) == 'videos')
{
?>
<video class="video"  width="https://wordpress.stackexchange.com/questions/91208/<?php  echo get_field("width'); ?>" height="https://wordpress.stackexchange.com/questions/91208/<?php  echo get_field("height'); ?>" controls preload>

                        <source src="https://wordpress.stackexchange.com/questions/91208/<?php  echo get_field("mp4'); ?>" media="only screen and (min-device-width: 960px)"></source>

                        <source src="https://wordpress.stackexchange.com/questions/91208/<?php  echo get_field("iphone'); ?>" media="only screen and (max-device-width: 960px)"></source>

                        <source src="https://wordpress.stackexchange.com/questions/91208/<?php  echo get_field("ogv'); ?>"></source>

                    </video>

          <h2><?php the_title(); ?></h2>

<?php  echo get_field('content'); ?>
<?php
}
?>