fix for a couple of minor problems

src/widgets/inline-video.jsx

@@ -31,7 +31,7 @@ export default class InlineVideo extends React.PureComponent {
           <div className="play-control">
             <i className="material-icons white bigger">play_arrow</i>
           </div>
-        : null}
+          : null}
         {duration ? <div className="duration">{duration}</div> : null}
       </div>
     );

src/widgets/video-preview.jsx

@@ -44,6 +44,7 @@ export default class VideoPreview extends React.PureComponent {
     const height = this.props.content.height || '-';
 
     const controlist = this.props.onSendMessage ? 'nodownload' : '';
+    const autoPlay = !this.props.onSendMessage;
 
     return (
       <div id="image-preview">
@@ -56,6 +57,7 @@ export default class VideoPreview extends React.PureComponent {
             className="image-preview"
             controls controlist={controlist}
             disablePictureInPicture ref={this.videoRef}
+            autoPlay={autoPlay}
             src={this.props.tinode.authorizeURL(this.props.content.url)}
             poster={this.props.content.preview}
             alt={this.props.content.filename} />