.bb-activity-media-wrap.bb-media-length-1 {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}

.bb-activity-media-wrap.bb-media-length-1 > img,
.bb-activity-media-wrap.bb-media-length-1 > video {
    position: relative;
    z-index: 2;
    display: block;
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.bb-media-length-1 .bb-activity-media-elem.media-activity{
	margin: auto;
}