ass="col-sm-3">
            <div class="video-header">Moving train</div>
            <div class="video-container">
                <iframe src="https://youtube.com/embed/Ta6H45rBzJc"></iframe>
            </div>
            </div>
            <div class="col-sm-3">
            <div class="video-header">Water splashing</div>
            <div class="video-container">
                <iframe src="https://youtube.com/embed/hl6AtgHXpb4"></iframe>
            </div>
            </div>
            <div class="col-