What best practices should be followed to ensure efficient video playback on mobile devices using PHP?

To ensure efficient video playback on mobile devices using PHP, it is important to properly encode and compress the video files for mobile playback, use responsive design techniques to ensure the video player adapts to different screen sizes, and implement lazy loading to only load the video when it is visible on the screen.

<?php
// Example code for embedding a responsive video player in PHP
echo '<div class="video-container">';
echo '<video controls>';
echo '<source src="video.mp4" type="video/mp4">';
echo 'Your browser does not support the video tag.';
echo '</video>';
echo '</div>';
?>