fix(html): update video when clicking previous/next (#35309)

packages/html-reporter/src/testResultView.tsx

@@ -127,7 +127,7 @@ export const TestResultView: React.FC<{
 
     {!!videos.length && <Anchor id='attachment-video'><AutoChip header='Videos' revealOnAnchorId='attachment-video'>
       {videos.map((a, i) => <div key={`video-${i}`}>
-        <video controls>
+        <video key={a.path} controls> {/* key is required to ensure video is updated when the path changes */}
           <source src={a.path} type={a.contentType}/>
         </video>
         <AttachmentLink attachment={a} result={result}></AttachmentLink>