add explicit hide/close button

inject.css

@@ -12,7 +12,7 @@
   margin: 10px;
   line-height: 1.8em;
 
-  cursor: pointer;
+  cursor: default;
   z-index: 9999999;
   opacity: 0.3;
 
@@ -20,9 +20,6 @@
   font-size: 13px;
 }
 
-.tc-videoController button {
-}
-
 .tc-videoController:hover {
   opacity: 0.7;
 }
@@ -37,6 +34,7 @@
 }
 
 .tc-controls button {
+  cursor: pointer;
   color: black !important;
   background: white !important;
   font-weight: bold !important;
@@ -47,6 +45,11 @@
   line-height: 15px !important;
 }
 
+.tc-videoController button.tc-hideButton {
+  margin: 0 2px 0 20px !important;
+  opacity: 0.8;
+}
+
 /* shift controller when YouTube infobar is present */
 .ytp-block-autohide:not(.el-detailpage):not(.hide-info-bar) .tc-videoController {
   margin-top: 40px;