fix(large-video) Call play() whenever a new stream is attached to large-video.

This fixes an issue on Safari where black video is rendered sometimes whenever a new stream is attached to the large video container.

modules/UI/videolayout/VideoContainer.js

@@ -495,6 +495,10 @@ export class VideoContainer extends LargeContainer {
 
         stream.attach(this.$video[0]);
 
+        // Ensure large video gets play() called on it when a new stream is attached to it. This is necessary in the
+        // case of Safari as autoplay doesn't kick-in automatically on Safari 15 and newer versions.
+        browser.isWebKitBased() && this.$video[0].play();
+
         const flipX = stream.isLocal() && this.localFlipX && !this.isScreenSharing();
 
         this.$video.css({