fix(downloads): a YouTube clip outside the catalog takes its title from the fetch

It was queued as "Clip (clip)" and stayed so: nothing renamed it once yt-dlp had answered.

backend/tests/test_clip.py

@@ -421,3 +421,22 @@ def test_service_reference_url_follows_the_clip_spec(db, make_user, as_user, yt_
     job = _clip(as_user(make_user()), source="youtube", ref=yt_video, start_s=65, end_s=90).json()
     row = db.get(DownloadJob, job["id"])
     assert service.reference_url(row, None) == f"https://www.youtube.com/watch?v={yt_video}&t=65s"
+
+
+def test_a_youtube_clip_outside_the_catalog_takes_its_title_from_the_fetch(
+    db, make_user, as_user, worker, monkeypatch
+):
+    def extract(job_id, asset_id, url, spec, staging, adapter, **kw):
+        f = Path(staging) / "zyxwvutsrqp.mp4"
+        f.write_bytes(b"range")
+        return {"requested_downloads": [{"filepath": str(f)}], "title": "Found On YouTube"}
+
+    monkeypatch.setattr(pipeline, "_extract_with_fallback", extract)
+    job = _clip(as_user(make_user()), source="youtube", ref="zyxwvutsrqp").json()
+    assert job["display_name"] == "Clip (clip)"
+    job, asset = worker["run"](job)
+    assert (job.status, asset.title, job.display_name) == (
+        "done",
+        "Found On YouTube (clip)",
+        "Found On YouTube (clip)",
+    )