What are the potential pitfalls of modifying a video player design on a website?

Modifying a video player design on a website can lead to potential pitfalls such as breaking the functionality of the player, causing compatibility issues with different browsers or devices, and impacting the overall user experience. To avoid these pitfalls, it is important to thoroughly test any design modifications before implementing them on a live website and to ensure that the changes do not interfere with the core functionality of the video player.

// Example PHP code snippet for implementing a video player design modification
// Make sure to test the changes thoroughly before deploying to a live website

<div class="custom-video-player">
    <video controls>
        <source src="video.mp4" type="video/mp4">
        Your browser does not support the video tag.
    </video>
</div>