diff --git a/js/ui/profileModal/myVideosReconcile.js b/js/ui/profileModal/myVideosReconcile.js
new file mode 100644
index 00000000..2fc337b3
--- /dev/null
+++ b/js/ui/profileModal/myVideosReconcile.js
@@ -0,0 +1,83 @@
+// Phase 2 reconciliation core for the "My Videos" tab: compare what the user's
+// video notes reference against what actually lives in their storage bucket, to
+// surface (a) MISSING files — an active note whose hosted file is gone — and
+// (b) ORPHAN objects — bucket files no live note references, including the
+// "deleted on Nostr but the folder is still in the bucket" case. Pure/sync so
+// it's deterministic and testable; the controller supplies the bucket listing.
+
+import { collectVideoStorageKeys } from "../../utils/storagePointer.js";
+
+function trimStr(value) {
+  return typeof value === "string" ? value.trim() : "";
+}
+
+// Derive the bucket KEY for a hosted URL (mirrors collectVideoStorageKeys'
+// internal keyFromUrl). Used to identify the PRIMARY video object so a missing
+// main file is flagged, without conflating it with a missing sibling .torrent.
+function keyFromUrl(url, publicBaseUrl) {
+  const u = trimStr(url);
+  const base = trimStr(publicBaseUrl).replace(/\/+$/, "");
+  if (!u || !base) {
+    return "";
+  }
+  const prefix = `${base}/`;
+  if (!u.startsWith(prefix)) {
+    return "";
+  }
+  let rel = u.slice(prefix.length).split(/[?#]/)[0];
+  try {
+    rel = rel.split("/").map((seg) => decodeURIComponent(seg)).join("/");
+  } catch (_) {
+    // keep raw if not valid percent-encoding
+  }
+  return rel.replace(/^\/+/, "");
+}
+
+/**
+ * Reconcile the user's videos against their bucket contents.
+ *
+ * @param {object} params
+ * @param {Array<object>} params.videos collapsed current-state videos
+ * @param {Array<string>} params.bucketKeys keys present in the bucket (ListObjectsV2)
+ * @param {string} params.publicBaseUrl the user's storage public base URL
+ * @returns {{
+ *   missing: Array<{ video: object, key: string }>,
+ *   orphanKeys: string[],
+ * }}
+ *   missing: active hosted notes whose primary file is absent from the bucket
+ *   orphanKeys: bucket objects not referenced by any live (non-deleted) note
+ */
+export function reconcileStorage({ videos = [], bucketKeys = [], publicBaseUrl = "" } = {}) {
+  const present = new Set(
+    (Array.isArray(bucketKeys) ? bucketKeys : []).filter(
+      (k) => typeof k === "string" && k,
+    ),
+  );
+  const referenced = new Set();
+  const missing = [];
+
+  for (const video of Array.isArray(videos) ? videos : []) {
+    if (!video || typeof video !== "object") {
+      continue;
+    }
+    // A deleted note references nothing (its URL was scrubbed by the tombstone),
+    // so any file left behind for it correctly falls through to orphanKeys.
+    if (video.deleted === true) {
+      continue;
+    }
+    // Whole bundle (video + sibling .torrent + thumbnail) counts as "referenced"
+    // so none of those are mistaken for orphans.
+    for (const key of collectVideoStorageKeys({ videos: [video], publicBaseUrl })) {
+      referenced.add(key);
+    }
+    // Missing status keys off the PRIMARY video object only (a missing .torrent
+    // or thumbnail is minor and shouldn't paint the row red).
+    const primary = keyFromUrl(video.url, publicBaseUrl);
+    if (primary && !present.has(primary)) {
+      missing.push({ video, key: primary });
+    }
+  }
+
+  const orphanKeys = [...present].filter((key) => !referenced.has(key));
+  return { missing, orphanKeys };
+}
diff --git a/tests/my-videos-reconcile.test.mjs b/tests/my-videos-reconcile.test.mjs
new file mode 100644
index 00000000..0194a48e
--- /dev/null
+++ b/tests/my-videos-reconcile.test.mjs
@@ -0,0 +1,92 @@
+// Phase 2 reconciliation: diff the user's notes against their bucket contents.
+// Must (a) flag a live note whose hosted file is gone as MISSING, (b) flag bucket
+// objects no live note references as ORPHANS — crucially including a deleted
+// video's leftover file (the "deleted on Nostr, still in the bucket" case) — and
+// (c) NEVER flag a file an active note still uses (incl. its .torrent/thumbnail).
+
+import assert from "node:assert/strict";
+import test from "node:test";
+import { reconcileStorage } from "../js/ui/profileModal/myVideosReconcile.js";
+
+const BASE = "https://cdn.example.com";
+const key = (k) => `${BASE}/${k}`;
+
+test("a deleted video's leftover file is reported as an orphan", () => {
+  const { orphanKeys, missing } = reconcileStorage({
+    // tombstone scrubbed the URL, so the note references nothing
+    videos: [{ deleted: true, url: "", magnet: "" }],
+    bucketKeys: ["u/npub1/abc/video.mp4", "u/npub1/abc/video.torrent"],
+    publicBaseUrl: BASE,
+  });
+  assert.deepEqual(orphanKeys.sort(), [
+    "u/npub1/abc/video.mp4",
+    "u/npub1/abc/video.torrent",
+  ]);
+  assert.equal(missing.length, 0);
+});
+
+test("a file an active note still uses (and its siblings) is never an orphan", () => {
+  const { orphanKeys } = reconcileStorage({
+    videos: [
+      {
+        url: key("u/npub1/abc/video.mp4"),
+        thumbnail: key("u/npub1/abc/thumb.jpg"),
+      },
+    ],
+    bucketKeys: [
+      "u/npub1/abc/video.mp4",
+      "u/npub1/abc/video.torrent",
+      "u/npub1/abc/thumb.jpg",
+    ],
+    publicBaseUrl: BASE,
+  });
+  assert.deepEqual(orphanKeys, [], "the whole referenced bundle is protected");
+});
+
+test("an active note whose hosted file is gone is reported as missing", () => {
+  const { missing } = reconcileStorage({
+    videos: [{ id: "v1", url: key("u/npub1/abc/video.mp4") }],
+    bucketKeys: ["u/npub1/other/thing.mp4"],
+    publicBaseUrl: BASE,
+  });
+  assert.equal(missing.length, 1);
+  assert.equal(missing[0].video.id, "v1");
+  assert.equal(missing[0].key, "u/npub1/abc/video.mp4");
+});
+
+test("a missing sibling .torrent does NOT mark the row missing (primary present)", () => {
+  const { missing } = reconcileStorage({
+    videos: [{ id: "v1", url: key("u/npub1/abc/video.mp4") }],
+    bucketKeys: ["u/npub1/abc/video.mp4"], // present, but no .torrent
+    publicBaseUrl: BASE,
+  });
+  assert.equal(missing.length, 0, "only a missing primary video file counts");
+});
+
+test("external-URL videos never produce missing or referenced keys", () => {
+  const { missing, orphanKeys } = reconcileStorage({
+    videos: [{ id: "v1", url: "https://third-party.example/v.mp4" }],
+    bucketKeys: ["u/npub1/abc/video.mp4"],
+    publicBaseUrl: BASE,
+  });
+  assert.equal(missing.length, 0, "can't be missing — not hosted by us");
+  assert.deepEqual(
+    orphanKeys,
+    ["u/npub1/abc/video.mp4"],
+    "the unrelated bucket file is still an orphan",
+  );
+});
+
+test("mixed library: one healthy, one missing, one orphan from a delete", () => {
+  const { missing, orphanKeys } = reconcileStorage({
+    videos: [
+      { id: "ok", url: key("u/n/ok/v.mp4") },
+      { id: "gone", url: key("u/n/gone/v.mp4") },
+      { id: "del", deleted: true, url: "" },
+    ],
+    bucketKeys: ["u/n/ok/v.mp4", "u/n/del/v.mp4"],
+    publicBaseUrl: BASE,
+  });
+  assert.deepEqual(missing.map((m) => m.video.id), ["gone"]);
+  assert.deepEqual(orphanKeys, ["u/n/del/v.mp4"]);
+});