feat: inline video player with Vimeo/MP4/YouTube support

▶ video button expands a player panel directly below the card:
- Vimeo (player.vimeo.com): iframe embed
- YouTube: iframe embed
- Direct MP4 / local file: <video> element
Click ▶ video to open, ✕ close (or click again) to dismiss.
Playback stops on close (iframe src reset, video.pause()).

No external navigation — user stays on the catalogue page.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

server.py

@@ -146,12 +146,28 @@ main { padding: 1.2rem 1.4rem; }
   text-decoration: none; border: 1px solid;
 }
 .jump.video  { color: #34d399; border-color: #34d399;
-               background: rgba(52,211,153,.08); }
+               background: rgba(52,211,153,.08); cursor: pointer; }
 .jump.pdf    { color: #f87171; border-color: #f87171;
                background: rgba(248,113,113,.08); }
 .jump.view   { color: var(--teal); border-color: var(--teal);
                background: rgba(20,184,166,.08); }
 
+/* ── inline video player ── */
+.video-panel {
+  margin-top: .7rem; border-radius: 8px; overflow: hidden;
+  background: #000; display: none;
+}
+.video-panel.open { display: block; }
+.video-panel iframe,
+.video-panel video {
+  width: 100%; aspect-ratio: 16/9; border: none; display: block;
+}
+.video-close {
+  display: flex; justify-content: flex-end; padding: .3rem .5rem;
+  background: #111; cursor: pointer; color: var(--dim); font-size: .8rem;
+}
+.video-close:hover { color: var(--ink); }
+
 .empty { color: var(--dim); padding: 2rem 0; text-align: center; }
 </style>
 </head>
@@ -272,15 +288,40 @@ function render() {
     : '<div class="empty">No artifacts match the current filters.</div>';
 }
 
+// Unique ID counter for video panels
+let _uid = 0;
+
+function embedHTML(videoUrl) {
+  if (!videoUrl) return '';
+  // Vimeo player.vimeo.com or vimeo.com/video/* → iframe embed
+  if (videoUrl.includes('vimeo.com')) {
+    // Ensure we use the player embed URL
+    const src = videoUrl.includes('player.vimeo.com')
+      ? videoUrl
+      : videoUrl.replace('vimeo.com/', 'player.vimeo.com/video/');
+    return `<iframe src="${src}" allow="autoplay; fullscreen; picture-in-picture" allowfullscreen></iframe>`;
+  }
+  // YouTube
+  if (videoUrl.includes('youtube.com') || videoUrl.includes('youtu.be')) {
+    const id = videoUrl.match(/(?:v=|youtu\.be\/)([^&?]+)/)?.[1];
+    if (id) return `<iframe src="https://www.youtube.com/embed/${id}" allow="autoplay; fullscreen" allowfullscreen></iframe>`;
+  }
+  // Direct MP4 / local file
+  return `<video src="${videoUrl}" controls preload="none"></video>`;
+}
+
 function cardHTML(a) {
   const icon = TYPE_ICONS[a.type] || '•';
   const badge = `<span class="badge ${a.type}">${a.type}</span>`;
   const date = a.date ? `<span>${a.date}</span>` : '';
   const course = a.course ? `<span style="color:var(--dim)">${a.course}</span>` : '';
 
+  const vid = a.video_url;
+  const panelId = vid ? `vp-${_uid++}` : '';
+
   const links = [];
-  if (a.type === 'transcript' && a.video_url) {
-    links.push(`<a class="jump video" href="${a.video_url}" target="_blank">▶ video</a>`);
+  if (vid) {
+    links.push(`<button class="jump video" onclick="toggleVideo('${panelId}',this)">▶ video</button>`);
   }
   if (a.source_url && a.type === 'pdf') {
     links.push(`<a class="jump pdf" href="${a.source_url}" target="_blank">📄 PDF</a>`);
@@ -289,16 +330,52 @@ function cardHTML(a) {
     links.push(`<a class="jump view" href="${a.served_url}" target="_blank">view text</a>`);
   }
 
+  const videoPanel = vid ? `
+  <div class="video-panel" id="${panelId}">
+    <div class="video-close" onclick="closeVideo('${panelId}')">✕ close</div>
+    ${embedHTML(vid)}
+  </div>` : '';
+
   return `<div class="card">
   <div class="type-icon">${icon}</div>
   <div class="card-body">
     <div class="card-title">${esc(a.title || a.id)}</div>
     <div class="card-meta">${badge}${date}${course}</div>
     ${links.length ? '<div class="jump-links">' + links.join('') + '</div>' : ''}
+    ${videoPanel}
   </div>
 </div>`;
 }
 
+function toggleVideo(panelId, btn) {
+  const panel = document.getElementById(panelId);
+  if (!panel) return;
+  const isOpen = panel.classList.contains('open');
+  if (isOpen) {
+    closeVideo(panelId);
+    btn.textContent = '▶ video';
+  } else {
+    panel.classList.add('open');
+    btn.textContent = '▼ video';
+    // Scroll panel into view smoothly
+    panel.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
+  }
+}
+
+function closeVideo(panelId) {
+  const panel = document.getElementById(panelId);
+  if (!panel) return;
+  panel.classList.remove('open');
+  // Stop playback by clearing src on iframe/video
+  const iframe = panel.querySelector('iframe');
+  const video = panel.querySelector('video');
+  if (iframe) { const s = iframe.src; iframe.src = ''; iframe.src = s; }
+  if (video) { video.pause(); video.currentTime = 0; }
+  // Reset button label
+  const btn = panel.closest('.card-body')?.querySelector('.jump.video');
+  if (btn) btn.textContent = '▶ video';
+}
+
 const esc = s => s.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
 
 loadCatalog();