yt-live-chat-text-message-renderer[author-type="owner"]::after {
  border: 2px solid rgba(255,214,0,1);
  content: "";
  position: absolute;
  display: block;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  box-sizing: border-box;
  border-radius: 0px;
}

yt-live-chat-text-message-renderer[author-type="moderator"]::after {
  border: 2px solid rgba(94,132,241,1);
  content: "";
  position: absolute;
  display: block;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  box-sizing: border-box;
  border-radius: 0px;
}

yt-live-chat-text-message-renderer[author-type="member"]::after {
  border: 2px solid rgba(15,157,88,1);
  content: "";
  position: absolute;
  display: block;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  box-sizing: border-box;
  border-radius: 0px;
}