AMP Brid Player plugin for WordPress, with support for non-AMP fallback: https://github.com/ampproject/amp-wp/issues/3638

amp-brid-player.php

<?php
/**
 * AMP Brid Player
 *
 * Installation instructions:
 *  1. Click the “Download ZIP” button.
 *  2. Rename the downloaded ZIP file to “amp-brid-player.zip”
 *  3. In the WordPress admin, go to Plugins > Add New
 *  4. Click the Upload Plugin button.
 *  5. Select the “amp-brid-player.zip” file and click “Install now”.
 *  6. Click “Activate”
 *
 * @package   AMP_Brid_Player
 * @author    Weston Ruter, Google
 * @license   GPL-2.0-or-later
 * @copyright 2019 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: AMP Brid Player
 * Description: Demonstration for how to add the Brid player, with both non-AMP and AMP-compatible versions served via shortcode. Example: <code>[brid partner=14896 player=19331 video=483405 autoplay=true]</code>.
 * Plugin URI: https://gist.github.com/westonruter/5f8dc16aba36c0ec9eef3750a22ac417
 * Version: 0.1.0
 * Author: Weston Ruter, Google
 * Author URI: https://weston.ruter.net/
 * License: GNU General Public License v2 (or later)
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 * Gist Plugin URI: https://gist.github.com/westonruter/5f8dc16aba36c0ec9eef3750a22ac417
 */

namespace AMP_Brid_Player;

const SHORTCODE = 'brid';

/**
 * Determines whether it is an AMP response.
 *
 * @return bool Is AMP.
 */
function is_amp() {
	return function_exists( 'is_amp_endpoint' ) && is_amp_endpoint();
}

/**
 * Render shortcode.
 *
 * @param array $attr Shortcode attributes.
 * @return string
 */
function render_shortcode( $attr ) {
	$attr = shortcode_atts(
		[
			'partner'  => '',
			'player'   => '',
			'video'    => '',
			'width'    => 700,
			'height'   => 393,
			'autoplay' => false,
		],
		$attr,
		SHORTCODE
	);

	// Ensure casting to array.
	$attr['autoplay'] = isset( $attr['autoplay'] ) && rest_sanitize_boolean( $attr['autoplay'] );

	if ( empty( $attr['partner'] ) || empty( $attr['player'] ) || empty( $attr['video'] ) ) {
		return '';
	}

	if ( is_amp() ) {
		return sprintf(
			'<amp-brid-player data-partner="%s" %s data-player="%s" data-video="%s" layout="responsive" width="%d" height="%s"></amp-brid-player>',
			esc_attr( $attr['partner'] ),
			$attr['autoplay'] ? 'autoplay' : '',
			esc_attr( $attr['player'] ),
			esc_attr( $attr['video'] ),
			esc_attr( $attr['width'] ),
			esc_attr( $attr['height'] )
		);
	} else {
		$element_id = wp_unique_id( 'brid-player' );
		$args       = [
			'div' => $element_id,
			'obj' => [
				'id'       => $attr['player'],
				'width'    => (string) $attr['width'],
				'height'   => (string) $attr['height'],
				'video'    => $attr['video'],
				'autoplay' => $attr['autoplay'],
			],
		];
		return sprintf(
			'
				<div id="%s" class="brid" style="width:%dpx; height:%dpx;" ></div>
				<script type="text/javascript"> var _bp = _bp||[]; _bp.push(%s); </script>
				<script type="text/javascript" async src="//services.brid.tv/player/build/brid.min.js"></script>
			',
			esc_attr( $element_id ),
			esc_attr( $attr['width'] ),
			esc_attr( $attr['height'] ),
			wp_json_encode( $args )
		);
	}
}

add_shortcode( SHORTCODE, __NAMESPACE__ . '\render_shortcode' );

Installation instructions: https://gist.github.com/westonruter/6110fbc4bef0c4b8c021a112012f7e9c