/* First make sure the video thumbnail images are responsive. */

.video-box img {
    max-width: 100%;
    height: auto;
}

/*
This is the starting grid for each video with thumbnails 4 across for the largest screen size.
It's important to use percentages or there may be gaps on the right side of the page.
*/

.video {
    background: #fff;
    padding-bottom: 20px;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15);
    width: 23%; /* Thumbnails 4 across */
    margin: 1%;
    float: left;
}

/*
These keep the height of each video thumbnail consistent between YouTube and Vimeo.
Each can have thumbnail sizes that vary by 1px and are likely break your layout.
*/

.video figure {
    height: 0;
    padding-bottom: 56.25%;
    overflow: hidden;
}
.video figure a {
    display: block;
    margin: 0;
    padding: 0;
    border: none;
    line-height: 0;
}

/* Media Queries - This is the responsive grid. */

@media (max-width: 1024px) {
    .video {
        width: 31.333%; /* Thumbnails 3 across */
    }
}

@media (max-width: 600px) {
    .video {
        width: 48%; /* Thumbnails 2 across */
    }
}

@media (max-width: 360px) {
    .video {
        display: block;
        width: 96%; /* Single column view. */
        margin: 2%; /* The smaller the screen, the smaller the percentage actually is. */
        float: none;
    }
}

/* These are my preferred rollover styles. */

.video img {
    width: 100%;
    opacity: 1;
}

.video img:hover, .video img:active, .video img:focus {
    opacity: 0.75;
}