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
}
?>