.flex {
    display: -ms-flexbox;
    display: flex;
    justify-content: space-around;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    margin: 20px auto;
}
.video_item {
    color: #3d3d3d;
    font-family: Arial;
    font-size: 12pt;
    text-align: center;
    width: 250px;
    border: 1px solid #969696;
    padding: 12px 0;
    cursor: pointer;
    margin: 10px 2px 0 2px;
}
.videos {
    margin-bottom: 25px;
}
.videos .title {
    border-radius: 5px;
    background-color: #39086d;
    padding: 10px;
    width: 100%;
    margin: 0 auto 10px auto;
}
.videos .title span {
    display: inline-block;
    vertical-align: middle;
    width: calc(100% - 35px);
    text-align: center;
    color: #fefefe;
    font-family: Arial;
    font-weight: bold;
    font-size: 13pt;

}
.videos .title img {
    display: inline-block;
    vertical-align: middle;
    width: 30px;
    cursor: pointer;
}
.videos iframe {
    width: 100%;
    max-height: 453px;
    margin: auto;
    display: block;
}
.download {
    color: #3d3d3d;
    font-size: 14pt;
    display: block;
    text-align: center;
    margin: 5px auto;
    font-family: arial;
}
.video_hover .big-in-center {
    display: block;
    max-width: 100%;
    margin: auto;
    cursor: pointer;
}

@media (min-width: 769px) and (max-width: 992px) {
    .video_item {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .video_item {
        font-size: 10pt;
        padding: 10px 0;
        width: 200px;
    }
    .videos {
        margin-bottom: 20px;
    }
    .videos .title {
        padding: 7px;
    }
    .videos .title span {
        font-size: 12pt;
        width: calc(100% - 25px);
    }
    .videos .title img {
        width: 25px;
    }
    .download {
        font-size: 12pt;
    }
}
@media (max-width: 660px) {
    .videos iframe {
        width: 500px;
        height: 290px;
    }
}

@media (max-width: 520px) {
    .videos iframe {
        width: 405px;
        height: 235px;
    }
}

@media (max-width: 424px) {
    .videos iframe {
        width: 355px;
        height: 200px;
    }
}

@media (max-width: 374px) {
    .videos iframe {
        width: 300px;
        height: 170px;
    }
}