a.status-link:not(.mention) {
  text-decoration: underline;
}

.media-gallery__item-thumbnail img:not([alt]),
.audio-player__canvas:not([title]),
.video-player video:not([title]), 
.media-gallery__gifv video:not([title])
 {
    border: 1px dashed rgba(47, 251, 251, 0.5);
    box-sizing: border-box;
}