Posts in columns with oEmbed support for excerpts on homepage in Dynamik. http://sridharkatakam.com/posts-columns-oembed-support-excerpts-homepage-dynamik/

front-page.php

<?php

/**
 * To display Posts on site's front page in a 2-column responsive grid.
 * URL: http://sridharkatakam.com/posts-columns-oembed-support-excerpts-homepage-dynamik/
 */

// Force full width content
add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );


// Force excerpts regardless of theme's Content Archive settings
add_filter( 'genesis_pre_get_option_content_archive', 'sk_force_excerpts' );
function sk_force_excerpts() {
	return 'excerpts';
}


// Remove featured images if set to appear in Content Archive settings (since it is not possible to select a custom size only for homepage)
add_filter( 'genesis_pre_get_option_content_archive_thumbnail', 'sk_show_post_image' );
function sk_show_post_image() {

	return '0';

}


// Show featured image with a custom image size
add_action( 'genesis_entry_content', 'custom_post_image', 9 );
function custom_post_image() {

	genesis_image( array( 'size' => 'custom-thumb-1' ) );

}


// Move featured image from below post info to above post title
// remove_action( 'genesis_entry_content', 'genesis_do_post_image', 8 );
// add_action( 'genesis_entry_header', 'genesis_do_post_image', 8 );

// Remove entry meta
remove_action( 'genesis_entry_footer', 'genesis_entry_footer_markup_open', 5 );
remove_action( 'genesis_entry_footer', 'genesis_entry_footer_markup_close', 15 );
remove_action( 'genesis_entry_footer', 'genesis_post_meta' );


// Add Post Class Filter to apply 'first' class to first (left) post in each row
add_filter('post_class', 'sk_post_class');
function sk_post_class($classes) {
	global $loop_counter;
	$classes[] = 'one-half';
	if (($loop_counter + 2) % 2 == 0) {
		$classes[] .= 'first';
	}
	$loop_counter++;
	return $classes;
}


// Custom excerpt showing first oEmbed
remove_filter('get_the_excerpt', 'wp_trim_excerpt');

add_filter('get_the_excerpt', 'custom_wp_trim_excerpt');
function custom_wp_trim_excerpt($text) {

	$raw_excerpt = $text;
	if ( '' == $text ) {
	$text = get_the_content(''); // Original Content
	$text = strip_shortcodes($text); // Minus Shortcodes
	$text = apply_filters('the_content', $text); // Filters
	$text = str_replace(']]>', ']]&gt;', $text); // Replace
	
	$excerpt_length = apply_filters('excerpt_length', 55); // Length
	$excerpt_more = apply_filters('excerpt_more', ' ' . '<a class="more-link" href="'. get_permalink() .'">Read more &raquo;</a>');
	$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
	
	// Add first oEmbed to excerpt
	$postcustom = get_post_custom_keys();
	if ($postcustom){
	  $i = 1;
	  foreach ($postcustom as $key){
		if (strpos($key,'oembed')){
		  foreach (get_post_custom_values($key) as $embedded_content){
			if ($i == 1){
			  $text = $text.$embedded_content;
			}
		  $i++;
		  }
		}  
	  }
	}
  }
  return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);

}

genesis();

functions.php

//* Enqueue FitVids
add_action( 'wp_enqueue_scripts', 'enqueue_fitvids' );
function enqueue_fitvids() {

	wp_enqueue_script( 'fitvids',  get_bloginfo('url') . '/wp-content/js/jquery.fitvids.js', array( 'jquery' ), '', true );
	wp_enqueue_script( 'fitvids-init',  get_bloginfo('url') . '/wp-content/js/jquery.fitvids.init.js', array( 'fitvids' ), '1.0.0', true );

}


//* Set number of posts per page for homepage
add_action( 'pre_get_posts', 'sk_posts_per_page_home' );
function sk_posts_per_page_home( $query ) {
	
	if( $query->is_main_query() && !is_admin() && is_home() ) {
		$query->set( 'posts_per_page', '4' );
	}

}

style.css

.home .content .entry.one-half {
    margin-left: 2.5641%;
}

.home .content .entry.one-half.first {
    margin-left: 0;
}

.home .entry iframe {
	margin-top: 20px;
}

.home .one-half {
	width: 48.7179%;
}

.home .content .override {
	padding-left: 0;
	padding-right: 0;
}

@media only screen and (max-width: 768px) {

.home .one-half {
	width: 100%;
}

.home .content .entry.one-half {
	margin-left: 0;
}

.home .content .entry {
	margin-bottom: 0;
}

}