teleop: mp4 file chips -> clip.html (with back button)

teleopSample/sort_ep1.html

@@ -217,8 +217,9 @@ window.addEventListener('resize',()=>update());
 const HFDS='https://huggingface.co/datasets/faradayfuture/teleopSample';
 document.getElementById('dsLink').href=HFDS+'/tree/main';
 const fm=document.getElementById('fileManifest');
-CAMS.forEach(c=>{ const a=document.createElement('a'); a.className='file-chip'; a.href=`media/${SLUG}/${c.key}.mp4`;
-  a.setAttribute('download',`${SLUG}_${c.key}.mp4`); a.innerHTML=`${c.key}.mp4`; fm.appendChild(a); });
+CAMS.forEach(c=>{ const a=document.createElement('a'); a.className='file-chip';
+  a.href=`clip.html?v=${encodeURIComponent('media/'+SLUG+'/'+c.key+'.mp4')}&back=${encodeURIComponent(SLUG+'.html')}&t=${encodeURIComponent(SLUG+' · '+c.key)}`;
+  a.innerHTML=`${c.key}.mp4`; fm.appendChild(a); });
 [[SLUG+'.parquet',SLUG+'.parquet'],
  [SLUG+'.meta.json',SLUG+'.meta.json']].forEach(([lbl,href])=>{
   const a=document.createElement('a'); a.className='file-chip'; a.href=href; a.innerHTML=lbl; fm.appendChild(a); });