Add video autoplay attributes to PublishVideoCheck (#1648)

Author: Doomann

.changeset/chilly-llamas-grow.md

@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Add video autoplay attributes to PublishVideoCheck

src/connectionHelper/checks/publishVideo.ts

@@ -46,6 +46,11 @@ export class PublishVideoCheck extends Checker {
     const video = document.createElement('video');
     video.srcObject = stream;
     video.muted = true;
+    video.autoplay = true;
+    video.playsInline = true;
+    // For iOS Safari
+    video.setAttribute('playsinline', 'true');
+    document.body.appendChild(video);
 
     await new Promise<void>((resolve) => {
       video.onplay = () => {