delete icon and background dark in video and gallery thubnail

/* delete icon and background dark in video and gallery thumbnails */

/* remove the icon */
.jeg_post.format-gallery .jeg_thumb:after , .jeg_post.format-video .jeg_thumb:after{
    content : none ;
}

/* remove the background */
.jeg_post.format-gallery .jeg_thumb:before, .jeg_post.format-video .jeg_thumb:before {
    background-color: transparent;
}