diff --git a/services/web-ui/public/screens-library.jsx b/services/web-ui/public/screens-library.jsx
index 045f6f7..4bb4223 100644
--- a/services/web-ui/public/screens-library.jsx
+++ b/services/web-ui/public/screens-library.jsx
@@ -7,14 +7,14 @@ function Library({ navigate, onOpenAsset, openProject }) {
   const [search, setSearch] = React.useState('');
 
   let assets = openProject
-    ? ALL_ASSETS.filter(a => a.project_id === openProject.id)
+    ? ALL_ASSETS.filter(function(a) { return a.project_id === openProject.id; })
     : ALL_ASSETS;
-  if (filter !== 'all') assets = assets.filter(a => a.status === filter);
-  if (search) assets = assets.filter(a => a.name.toLowerCase().includes(search.toLowerCase()));
+  if (filter !== 'all') assets = assets.filter(function(a) { return a.status === filter; });
+  if (search) assets = assets.filter(function(a) { return a.name.toLowerCase().includes(search.toLowerCase()); });
 
   const displayTitle = openProject ? openProject.name : 'All Assets';
-  const errorCount = ALL_ASSETS.filter(a => a.status === 'error').length;
-  const recentCount = ALL_ASSETS.filter(a => (Date.now() - new Date(a.created_at)) < 86400000).length;
+  const errorCount = ALL_ASSETS.filter(function(a) { return a.status === 'error'; }).length;
+  const recentCount = ALL_ASSETS.filter(function(a) { return (Date.now() - new Date(a.created_at)) < 86400000; }).length;
 
   return (
     <div className="library-layout">
@@ -22,41 +22,45 @@ function Library({ navigate, onOpenAsset, openProject }) {
         <div>
           <h4>Projects</h4>
           <div className="rail-list">
-            <div className={`rail-item ${!openProject ? 'active' : ''}`} onClick={() => navigate('library')} style={{ cursor: 'pointer' }}>
+            <div className={`rail-item ${!openProject ? 'active' : ''}`} onClick={function() { navigate('library'); }} style={{ cursor: 'pointer' }}>
               <Icon name="library" size={13} className="rail-icon" />
               <span>All projects</span>
               <span className="rail-count">{ALL_ASSETS.length}</span>
             </div>
-            {PROJECTS.slice(0, 8).map(p => (
-              <div key={p.id} className={`rail-item ${openProject && openProject.id === p.id ? 'active' : ''}`} style={{ cursor: 'pointer' }}
-                onClick={() => { navigate('projects'); }}>
-                <span className="rail-color-dot" style={{ background: p.color }} />
-                <span style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{p.name}</span>
-                <span className="rail-count">{p.assets}</span>
-              </div>
-            ))}
+            {PROJECTS.slice(0, 8).map(function(p) {
+              return (
+                <div key={p.id} className={`rail-item ${openProject && openProject.id === p.id ? 'active' : ''}`} style={{ cursor: 'pointer' }}
+                  onClick={function() { navigate('projects'); }}>
+                  <span className="rail-color-dot" style={{ background: p.color }} />
+                  <span style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{p.name}</span>
+                  <span className="rail-count">{p.assets}</span>
+                </div>
+              );
+            })}
           </div>
         </div>
         {BINS.length > 0 && (
           <div>
             <h4>Bins</h4>
             <div className="rail-list">
-              {BINS.map(b => (
-                <div key={b.id} className="rail-item">
-                  <Icon name={binIcon(b.icon)} size={13} className="rail-icon" />
-                  <span>{b.name}</span>
-                  <span className="rail-count">{b.count}</span>
-                </div>
-              ))}
+              {BINS.map(function(b) {
+                return (
+                  <div key={b.id} className="rail-item">
+                    <Icon name={binIcon(b.icon)} size={13} className="rail-icon" />
+                    <span>{b.name}</span>
+                    <span className="rail-count">{b.count}</span>
+                  </div>
+                );
+              })}
             </div>
           </div>
         )}
         <div>
           <h4>Smart filters</h4>
           <div className="rail-list">
-            {errorCount > 0 && <div className="rail-item" onClick={() => setFilter('error')} style={{ cursor: 'pointer' }}><Icon name="alert" size={13} className="rail-icon" /><span>Errors</span><span className="rail-count">{errorCount}</span></div>}
-            <div className="rail-item" onClick={() => setFilter('all')} style={{ cursor: 'pointer' }}><Icon name="clock" size={13} className="rail-icon" /><span>Last 24h</span><span className="rail-count">{recentCount}</span></div>
-            <div className="rail-item" onClick={() => setFilter('ready')} style={{ cursor: 'pointer' }}><Icon name="check" size={13} className="rail-icon" /><span>Ready</span><span className="rail-count">{ALL_ASSETS.filter(a => a.status === 'ready').length}</span></div>
+            {errorCount > 0 && <div className="rail-item" onClick={function() { setFilter('error'); }} style={{ cursor: 'pointer' }}><Icon name="alert" size={13} className="rail-icon" /><span>Errors</span><span className="rail-count">{errorCount}</span></div>}
+            <div className="rail-item" onClick={function() { setFilter('all'); }} style={{ cursor: 'pointer' }}><Icon name="clock" size={13} className="rail-icon" /><span>Last 24h</span><span className="rail-count">{recentCount}</span></div>
+            <div className="rail-item" onClick={function() { setFilter('ready'); }} style={{ cursor: 'pointer' }}><Icon name="check" size={13} className="rail-icon" /><span>Ready</span><span className="rail-count">{ALL_ASSETS.filter(function(a) { return a.status === 'ready'; }).length}</span></div>
           </div>
         </div>
       </aside>
@@ -68,51 +72,55 @@ function Library({ navigate, onOpenAsset, openProject }) {
           <div style={{ flex: 1 }} />
           <div className="search" style={{ width: 220 }}>
             <Icon name="search" className="search-icon" />
-            <input value={search} onChange={e => setSearch(e.target.value)} placeholder="Filter assets…" />
+            <input value={search} onChange={function(e) { setSearch(e.target.value); }} placeholder="Filter assets…" />
           </div>
           <div className="tab-group">
-            {['all', 'ready', 'processing', 'live', 'error'].map(f => (
-              <button key={f} className={filter === f ? 'active' : ''} onClick={() => setFilter(f)}>
-                {f === 'all' ? 'All' : f[0].toUpperCase() + f.slice(1)}
-              </button>
-            ))}
+            {['all', 'ready', 'processing', 'live', 'error'].map(function(f) {
+              return (
+                <button key={f} className={filter === f ? 'active' : ''} onClick={function() { setFilter(f); }}>
+                  {f === 'all' ? 'All' : f[0].toUpperCase() + f.slice(1)}
+                </button>
+              );
+            })}
           </div>
           <div className="tab-group">
-            <button className={view === 'grid' ? 'active' : ''} onClick={() => setView('grid')}><Icon name="grid" size={12} /></button>
-            <button className={view === 'list' ? 'active' : ''} onClick={() => setView('list')}><Icon name="list" size={12} /></button>
+            <button className={view === 'grid' ? 'active' : ''} onClick={function() { setView('grid'); }}><Icon name="grid" size={12} /></button>
+            <button className={view === 'list' ? 'active' : ''} onClick={function() { setView('list'); }}><Icon name="list" size={12} /></button>
           </div>
-          <button className="btn primary" onClick={() => navigate('upload')}><Icon name="upload" />Upload</button>
+          <button className="btn primary" onClick={function() { navigate('upload'); }}><Icon name="upload" />Upload</button>
         </div>
 
         {assets.length === 0 ? (
           <div style={{ padding: 60, textAlign: 'center', color: 'var(--text-3)' }}>No assets match this filter.</div>
         ) : view === 'grid' ? (
           <div className="library-grid">
-            {assets.map(a => <AssetCard key={a.id} asset={a} onOpen={() => onOpenAsset(a)} />)}
+            {assets.map(function(a) { return <AssetCard key={a.id} asset={a} onOpen={function() { onOpenAsset(a); }} />; })}
           </div>
         ) : (
           <div className="library-list">
             <div className="list-row head">
               <div></div><div>Name</div><div>Duration</div><div>Resolution</div><div>Codec</div><div>Size</div><div>Updated</div><div></div>
             </div>
-            {assets.map(a => (
-              <div key={a.id} className="list-row" onClick={() => onOpenAsset(a)} style={{ cursor: 'pointer' }}>
-                <div className="thumb"><AssetThumb asset={a} /></div>
-                <div>
-                  <div className="name">{a.name}</div>
-                  <div style={{ display: 'flex', gap: 6, marginTop: 2 }}>
-                    <StatusDot status={a.status} />
-                    <span style={{ fontSize: 11, color: 'var(--text-3)' }}>{a.status}</span>
+            {assets.map(function(a) {
+              return (
+                <div key={a.id} className="list-row" onClick={function() { onOpenAsset(a); }} style={{ cursor: 'pointer' }}>
+                  <div className="thumb"><AssetThumb asset={a} /></div>
+                  <div>
+                    <div className="name">{a.name}</div>
+                    <div style={{ display: 'flex', gap: 6, marginTop: 2 }}>
+                      <StatusDot status={a.status} />
+                      <span style={{ fontSize: 11, color: 'var(--text-3)' }}>{a.status}</span>
+                    </div>
                   </div>
+                  <div className="col-sub">{a.duration}</div>
+                  <div className="col-sub">{a.res}</div>
+                  <div className="col-sub">{a.codec || '—'}</div>
+                  <div className="col-sub">{a.size}</div>
+                  <div className="col-sub">{a.updated}</div>
+                  <button className="icon-btn" onClick={function(e) { e.stopPropagation(); }}><Icon name="more" /></button>
                 </div>
-                <div className="col-sub">{a.duration}</div>
-                <div className="col-sub">{a.res}</div>
-                <div className="col-sub">{a.codec || '—'}</div>
-                <div className="col-sub">{a.size}</div>
-                <div className="col-sub">{a.updated}</div>
-                <button className="icon-btn" onClick={e => e.stopPropagation()}><Icon name="more" /></button>
-              </div>
-            ))}
+              );
+            })}
           </div>
         )}
       </div>
@@ -121,9 +129,66 @@ function Library({ navigate, onOpenAsset, openProject }) {
 }
 
 function AssetCard({ asset, onOpen }) {
+  const [hoverStream, setHoverStream] = React.useState(null);
+  const [hovered, setHovered] = React.useState(false);
+  const timerRef = React.useRef(null);
+  const hlsRef = React.useRef(null);
+  const videoRef = React.useRef(null);
+
+  const handleMouseEnter = function() {
+    timerRef.current = setTimeout(function() {
+      setHovered(true);
+      if (!hoverStream && (asset.status === 'ready' || asset.status === 'live')) {
+        window.ZAMPP_API.fetch('/assets/' + asset.id + '/stream')
+          .then(function(r) { if (r && r.url) setHoverStream(r); })
+          .catch(function() {});
+      }
+    }, 350);
+  };
+
+  const handleMouseLeave = function() {
+    clearTimeout(timerRef.current);
+    setHovered(false);
+  };
+
+  // HLS wiring
+  React.useEffect(function() {
+    if (!hovered || !hoverStream || hoverStream.type !== 'hls' || !videoRef.current) return;
+    if (!window.Hls) return;
+    hlsRef.current = new window.Hls({ maxBufferLength: 10 });
+    hlsRef.current.loadSource(hoverStream.url);
+    hlsRef.current.attachMedia(videoRef.current);
+    return function() {
+      if (hlsRef.current) { hlsRef.current.destroy(); hlsRef.current = null; }
+    };
+  }, [hovered, hoverStream]);
+
+  const showVideo = hovered && hoverStream;
+
   return (
-    <div className="asset-card" onClick={onOpen}>
-      <AssetThumb asset={asset} />
+    <div className="asset-card" onClick={onOpen} onMouseEnter={handleMouseEnter} onMouseLeave={handleMouseLeave}>
+      <div style={{ position: 'relative' }}>
+        <AssetThumb asset={asset} />
+        {showVideo && (
+          <video
+            key={hoverStream.url}
+            ref={videoRef}
+            src={hoverStream.type !== 'hls' ? hoverStream.url : undefined}
+            autoPlay
+            muted
+            loop
+            playsInline
+            style={{
+              position: 'absolute',
+              inset: 0,
+              width: '100%',
+              height: '100%',
+              objectFit: 'cover',
+              borderRadius: 6,
+            }}
+          />
+        )}
+      </div>
       <div className="thumb-status">
         {asset.status === 'live' && <span className="badge live">LIVE</span>}
         {asset.status === 'processing' && <span className="badge warning">Processing</span>}