Helper::get_thumbnail( string $size = 'small', string $before = '', string $after = '', bool $echo = true )

	public static function get_thumbnail( $size = 'small', $before = '', $after = '', $echo = true ){

		$img_url = self::get_thumbnail_url( $size );

		/**
		 * Filter that allows additional CSS classes to be added to images.
		 *
		 * @param array         $classes    Array of CSS classes.
		 * @param Video_Post    $video      The video post being processed.
		 */
		$classes = apply_filters(
			'vimeotheque\themes\image_class',
			// class no-lazy is needed for W3 Total Cache to avoid lazy loading images and breaking scripts
			['vimeotheque-playlist', 'image', 'no-lazy'],
			self::current_video_post()
		);

		$css_class = is_array( $classes ) ? implode( ' ', $classes ) : '';

		$output =
			$img_url ?
				sprintf(
					'<img src="%s" alt="" class="%s" />',
					$img_url,
					$css_class
				) :
				'';

		if( $echo ){
			echo $before . $output . $after;
		}

		return $before . $output . $after;
	}