/**
 *
 * Insert ads before video player
 *
 */
function videotube_ads_before_video(){
    ?>
    <!-- Ads code goes here -->

    <?php
}
add_action( 'videotube_before_video', 'videotube_ads_before_video' );

/**
 *
 * Insert ads after video player
 *
 */
function videotube_ads_after_video(){
    ?>
    <!-- Ads code goes here -->

    <?php
}
add_action( 'videotube_after_video', 'videotube_ads_after_video' );