* {
    box-sizing: border-box;
    margin: 0;
}

body {
    background-color: #eee;
    font-family: 'Lato', sans-serif;
    
    border: 1px solid black;
}


main {
    width: 80%;
    margin: auto;
    padding-top: 4rem;
}




#features {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    margin-left: 28%;
    margin-top: 5%;
}

#video {
    margin-left: 30%;
    margin-top: 5%;
}

footer {
    background-color: rgba(0,0,0, 0.1);
    text-align: end;
    width: 950px;
    margin: 2em auto 0 auto;
    padding: 1em;
}

footer > a {
    color: #000;
    text-decoration: none;
    font-weight: 500;
    margin: 0.5em;
}

footer > p {
    margin-top: 0.2em;
    font-size: 0.9em;
}

@media screen and (max-width: 952px) {
    footer {
        width: auto;
    }

    
}

    <main>

          <section id="features">
            <div>
                <h2>Premium Materials</h2>
                <p>Our trombones use the shiniest brass which is sourced locally. This will increase the longevity of your purchase.</p>
                <br><br>
            </div>

            

            <div>
                <h2>Fast Shipping</h2>
                <p>We make sure you recieve your trombone as soon as we have finished making it. We also provide free returns if you are not satisfied.</p>
                <br><br>
            </div>


            <div>
                <h2>Quality Assurance</h2>
                <p>For every purchase you make, we will ensure there are no damages or faults and we will check and test the pitch of your instrument.</p>
                <br><br>
            </div>

          </section>

          <section>
            <iframe width="560" id="video" height="315" src="https://www.youtube-nocookie.com/embed/y8Yv4pnO7qc?si=6TmQlZHbZ_rJsacf&controls=0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
          </section>

         
    </main>

    <footer>

        <a href="#">Privacy</a>
        <a href="#">Terms</a>
        <a href="#">Contact</a>

        <p>Copyright 2016, Original Trombones</p>
    </footer>