Prevent clicks on video from initiating selections

app/javascript/flavours/glitch/components/media_gallery.js

@@ -78,6 +78,11 @@ class Item extends React.PureComponent {
     e.stopPropagation();
   }
 
+  handleMouseDown = (e) => {
+    e.preventDefault();
+    e.stopPropagation();
+  }
+
   render () {
     const { attachment, index, size, standalone, letterbox, displayWidth } = this.props;
 
@@ -181,6 +186,7 @@ class Item extends React.PureComponent {
             onClick={this.handleClick}
             onMouseEnter={this.handleMouseEnter}
             onMouseLeave={this.handleMouseLeave}
+            onMouseDown={this.handleMouseDown}
             autoPlay={autoPlay}
             loop
             muted

app/javascript/flavours/glitch/features/video/index.js

@@ -135,7 +135,10 @@ export default class Video extends React.PureComponent {
     this.seek = c;
   }
 
-  handleClickRoot = e => e.stopPropagation();
+  handleMouseDownRoot = e => {
+    e.preventDefault();
+    e.stopPropagation();
+  }
 
   handlePlay = () => {
     this.setState({ paused: false });
@@ -319,7 +322,7 @@ export default class Video extends React.PureComponent {
         ref={this.setPlayerRef}
         onMouseEnter={this.handleMouseEnter}
         onMouseLeave={this.handleMouseLeave}
-        onClick={this.handleClickRoot}
+        onMouseDown={this.handleMouseDownRoot}
         tabIndex={0}
       >
         <video