diff --git a/src/content/ui/i18n.ts b/src/content/ui/i18n.ts
index 5167a1e..4eb8389 100644
--- a/src/content/ui/i18n.ts
+++ b/src/content/ui/i18n.ts
@@ -23,7 +23,14 @@ type MessageKey =
   | "statsDuration"
   | "statsChannels"
   | "statsPlayable"
-  | "statsTotalViews";
+  | "statsTotalViews"
+  | "statsDetail"
+  | "statsDetailChannelRank"
+  | "statsDetailAddedByRank"
+  | "statsDetailCategoryBreak"
+  | "statsDetailDurationAvg"
+  | "statsDetailDurationMedian"
+  | "statsDetailVideos";
 
 const messages: Record<string, Record<MessageKey, string>> = {
   ja: {
@@ -43,7 +50,7 @@ const messages: Record<string, Record<MessageKey, string>> = {
     badgeLive: "ライブ",
     headerVideos: "本の動画",
     headerLoading: "読み込み中…",
-    fetchViews: "再生数を取得",
+    fetchViews: "全件詳細を取得",
     fetchViewsProgress: "取得中…",
     fetchViewsDone: "取得完了",
     colSettings: "表示",
@@ -52,6 +59,13 @@ const messages: Record<string, Record<MessageKey, string>> = {
     statsChannels: "チャンネル",
     statsPlayable: "再生可能",
     statsTotalViews: "総再生数",
+    statsDetail: "詳細",
+    statsDetailChannelRank: "チャンネル別",
+    statsDetailAddedByRank: "追加者別",
+    statsDetailCategoryBreak: "カテゴリ別",
+    statsDetailDurationAvg: "平均再生時間",
+    statsDetailDurationMedian: "中央値",
+    statsDetailVideos: "本",
   },
   en: {
     colIndex: "#",
@@ -70,7 +84,7 @@ const messages: Record<string, Record<MessageKey, string>> = {
     badgeLive: "LIVE",
     headerVideos: "videos",
     headerLoading: "loading…",
-    fetchViews: "Fetch views",
+    fetchViews: "Fetch all details",
     fetchViewsProgress: "Fetching…",
     fetchViewsDone: "Done",
     colSettings: "View",
@@ -79,6 +93,13 @@ const messages: Record<string, Record<MessageKey, string>> = {
     statsChannels: "Channels",
     statsPlayable: "Playable",
     statsTotalViews: "Total views",
+    statsDetail: "Details",
+    statsDetailChannelRank: "By channel",
+    statsDetailAddedByRank: "By contributor",
+    statsDetailCategoryBreak: "By category",
+    statsDetailDurationAvg: "Avg. duration",
+    statsDetailDurationMedian: "Median",
+    statsDetailVideos: "videos",
   },
 };
 
diff --git a/src/content/ui/styles.ts b/src/content/ui/styles.ts
index ed56511..7c0a51e 100644
--- a/src/content/ui/styles.ts
+++ b/src/content/ui/styles.ts
@@ -85,10 +85,172 @@ html[dark] .ytpf-stat-value {
   color: #f1f1f1;
 }
 
+.ytpf-stats-detail-btn {
+  padding: 2px 8px;
+  border: 1px solid var(--yt-spec-10-percent-layer, rgba(0,0,0,0.2));
+  border-radius: 12px;
+  background: transparent;
+  color: var(--yt-spec-text-secondary, #606060);
+  font-size: 11px;
+  font-family: "Roboto", "Arial", sans-serif;
+  cursor: pointer;
+  white-space: nowrap;
+}
+
+html[dark] .ytpf-stats-detail-btn {
+  border-color: rgba(255,255,255,0.2);
+  color: #aaa;
+}
+
+.ytpf-stats-detail-btn:hover {
+  background: var(--yt-spec-badge-chip-background, #f2f2f2);
+}
+
+html[dark] .ytpf-stats-detail-btn:hover {
+  background: #3e3e3e;
+}
+
 .ytpf-stats-spacer {
   flex: 1;
 }
 
+.ytpf-detail-popup {
+  position: fixed;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  background: #fff;
+  border: 1px solid rgba(0,0,0,0.1);
+  border-radius: 12px;
+  padding: 20px 24px;
+  min-width: 360px;
+  max-width: 560px;
+  max-height: 70vh;
+  overflow-y: auto;
+  z-index: 3000;
+  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
+  font-family: "Roboto", "Arial", sans-serif;
+  font-size: 13px;
+  color: var(--yt-spec-text-primary, #0f0f0f);
+}
+
+html[dark] .ytpf-detail-popup {
+  background: #212121;
+  border-color: rgba(255,255,255,0.1);
+  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
+  color: #f1f1f1;
+}
+
+.ytpf-detail-popup-backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(0,0,0,0.4);
+  z-index: 2999;
+}
+
+.ytpf-detail-popup h3 {
+  font-size: 15px;
+  font-weight: 500;
+  margin: 0 0 16px;
+}
+
+.ytpf-detail-section {
+  margin-bottom: 16px;
+}
+
+.ytpf-detail-section:last-child {
+  margin-bottom: 0;
+}
+
+.ytpf-detail-section-title {
+  font-size: 12px;
+  font-weight: 500;
+  color: var(--yt-spec-text-secondary, #606060);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  margin-bottom: 6px;
+}
+
+html[dark] .ytpf-detail-section-title {
+  color: #aaa;
+}
+
+.ytpf-detail-bar-row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 3px;
+  font-size: 12px;
+}
+
+.ytpf-detail-bar-label {
+  width: 140px;
+  flex-shrink: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.ytpf-detail-bar-track {
+  flex: 1;
+  height: 14px;
+  background: var(--yt-spec-10-percent-layer, rgba(0,0,0,0.06));
+  border-radius: 3px;
+  overflow: hidden;
+}
+
+html[dark] .ytpf-detail-bar-track {
+  background: rgba(255,255,255,0.08);
+}
+
+.ytpf-detail-bar-fill {
+  height: 100%;
+  border-radius: 3px;
+  background: var(--yt-spec-call-to-action, #065fd4);
+  opacity: 0.7;
+}
+
+html[dark] .ytpf-detail-bar-fill {
+  background: #3ea6ff;
+}
+
+.ytpf-detail-bar-count {
+  width: 48px;
+  flex-shrink: 0;
+  text-align: right;
+  font-family: "Roboto Mono", monospace;
+  font-size: 11px;
+  color: var(--yt-spec-text-secondary, #606060);
+}
+
+html[dark] .ytpf-detail-bar-count {
+  color: #aaa;
+}
+
+.ytpf-detail-kv {
+  display: flex;
+  gap: 12px;
+  flex-wrap: wrap;
+  font-size: 12px;
+}
+
+.ytpf-detail-kv-item {
+  color: var(--yt-spec-text-secondary, #606060);
+}
+
+html[dark] .ytpf-detail-kv-item {
+  color: #aaa;
+}
+
+.ytpf-detail-kv-value {
+  font-family: "Roboto Mono", monospace;
+  color: var(--yt-spec-text-primary, #0f0f0f);
+}
+
+html[dark] .ytpf-detail-kv-value {
+  color: #f1f1f1;
+}
+
 .ytpf-filters {
   display: flex;
   align-items: flex-start;
diff --git a/src/content/ui/table-renderer.ts b/src/content/ui/table-renderer.ts
index 50cac92..77b3e35 100644
--- a/src/content/ui/table-renderer.ts
+++ b/src/content/ui/table-renderer.ts
@@ -539,6 +539,154 @@ export function renderPlaylistTable(data: PlaylistData, columnPrefs: ColumnPrefs
     }
   }
 
+  // Stats detail button + popup
+  const detailBtn = document.createElement("button");
+  detailBtn.className = "ytpf-stats-detail-btn";
+  detailBtn.textContent = t("statsDetail");
+
+  function countBy<T>(arr: T[], keyFn: (item: T) => string | null): [string, number][] {
+    const map = new Map<string, number>();
+    for (const item of arr) {
+      const key = keyFn(item);
+      if (key != null) map.set(key, (map.get(key) ?? 0) + 1);
+    }
+    return [...map.entries()].sort((a, b) => b[1] - a[1]);
+  }
+
+  function buildDetailPopup(): { backdrop: HTMLElement; popup: HTMLElement } {
+    const backdrop = document.createElement("div");
+    backdrop.className = "ytpf-detail-popup-backdrop";
+
+    const popup = document.createElement("div");
+    popup.className = "ytpf-detail-popup";
+
+    const title = document.createElement("h3");
+    title.textContent = `${data.metadata.title} — ${t("statsDetail")}`;
+    popup.appendChild(title);
+
+    // Duration stats
+    const durations = videos
+      .map((v) => v.durationSeconds)
+      .filter((d): d is number => d != null && d > 0)
+      .sort((a, b) => a - b);
+
+    if (durations.length > 0) {
+      const avg = Math.round(durations.reduce((a, b) => a + b, 0) / durations.length);
+      const median = durations[Math.floor(durations.length / 2)];
+
+      const section = document.createElement("div");
+      section.className = "ytpf-detail-section";
+      const kv = document.createElement("div");
+      kv.className = "ytpf-detail-kv";
+
+      function addKV(label: string, value: string) {
+        const item = document.createElement("span");
+        item.className = "ytpf-detail-kv-item";
+        item.textContent = `${label}: `;
+        const val = document.createElement("span");
+        val.className = "ytpf-detail-kv-value";
+        val.textContent = value;
+        item.appendChild(val);
+        kv.appendChild(item);
+      }
+
+      addKV(t("statsDetailDurationAvg"), formatDuration(avg));
+      addKV(t("statsDetailDurationMedian"), formatDuration(median));
+      section.appendChild(kv);
+      popup.appendChild(section);
+    }
+
+    // Channel ranking
+    const channelCounts = countBy(videos, (v) => v.channel.name);
+    if (channelCounts.length > 0) {
+      popup.appendChild(buildBarSection(
+        t("statsDetailChannelRank"),
+        channelCounts.slice(0, 20),
+        channelCounts[0][1],
+      ));
+    }
+
+    // Added-by ranking (collab)
+    if (isCollab) {
+      const addedByCounts = countBy(videos, (v) => v.addedBy);
+      if (addedByCounts.length > 0) {
+        popup.appendChild(buildBarSection(
+          t("statsDetailAddedByRank"),
+          addedByCounts,
+          addedByCounts[0][1],
+        ));
+      }
+    }
+
+    // Category breakdown (after detail fetch)
+    const categoryCounts = countBy(videos, (v) => v.category);
+    if (categoryCounts.length > 0) {
+      popup.appendChild(buildBarSection(
+        t("statsDetailCategoryBreak"),
+        categoryCounts,
+        categoryCounts[0][1],
+      ));
+    }
+
+    return { backdrop, popup };
+  }
+
+  function buildBarSection(title: string, entries: [string, number][], maxCount: number): HTMLElement {
+    const section = document.createElement("div");
+    section.className = "ytpf-detail-section";
+
+    const heading = document.createElement("div");
+    heading.className = "ytpf-detail-section-title";
+    heading.textContent = title;
+    section.appendChild(heading);
+
+    for (const [name, count] of entries) {
+      const row = document.createElement("div");
+      row.className = "ytpf-detail-bar-row";
+
+      const label = document.createElement("span");
+      label.className = "ytpf-detail-bar-label";
+      label.textContent = name;
+      label.title = name;
+
+      const track = document.createElement("div");
+      track.className = "ytpf-detail-bar-track";
+      const fill = document.createElement("div");
+      fill.className = "ytpf-detail-bar-fill";
+      fill.style.width = `${(count / maxCount) * 100}%`;
+      track.appendChild(fill);
+
+      const countSpan = document.createElement("span");
+      countSpan.className = "ytpf-detail-bar-count";
+      countSpan.textContent = String(count);
+
+      row.append(label, track, countSpan);
+      section.appendChild(row);
+    }
+
+    return section;
+  }
+
+  let detailPopupOpen = false;
+
+  detailBtn.addEventListener("click", (e) => {
+    e.stopPropagation();
+    if (detailPopupOpen) return;
+    detailPopupOpen = true;
+
+    const { backdrop, popup } = buildDetailPopup();
+
+    function close() {
+      backdrop.remove();
+      popup.remove();
+      detailPopupOpen = false;
+    }
+
+    backdrop.addEventListener("click", close);
+    document.body.appendChild(backdrop);
+    document.body.appendChild(popup);
+  });
+
   const statsSpacer = document.createElement("span");
   statsSpacer.className = "ytpf-stats-spacer";
 
@@ -561,7 +709,7 @@ export function renderPlaylistTable(data: PlaylistData, columnPrefs: ColumnPrefs
     } satisfies Message);
   });
 
-  statsBar.append(statDuration, statChannels, statPlayable, statTotalViews, statsSpacer, fetchBtn);
+  statsBar.append(statDuration, statChannels, statPlayable, statTotalViews, detailBtn, statsSpacer, fetchBtn);
   wrapper.appendChild(statsBar);
 
   // Filter bar