diff --git a/experiments/xsource/README.md b/experiments/xsource/README.md
index 903ceb1..a3fff15 100644
--- a/experiments/xsource/README.md
+++ b/experiments/xsource/README.md
@@ -7,9 +7,29 @@ perfect, so it isolates the embedder. This one downscales the **whole frame**
 before the detector, so detection and landmark regression degrade with it.
 
 Corpus: two Pexels clips of one shoot (4096×2160, 25 fps), four people, all four
-present in both. Clips and hand-sorted crops are gitignored — push them with
-`scripts/artifacts/push_artifacts.sh`, because the sorting is human ground truth
-and expensive to redo.
+present in both.
+
+## Getting the data
+
+Clips, frames and hand-sorted crops are gitignored; they live in the artifact
+registry.
+
+    scripts/artifacts/pull_artifacts.sh xsource     # clips + labelling, frames regenerated
+    scripts/artifacts/push_artifacts.sh xsource     # after correcting labels
+
+Pulling fetches the two clips and the hand-sorted crops, then regenerates the
+frames with ffmpeg — ~320 MB of PNG that is deterministic from the clips, so it
+is not worth shipping. Extraction settings are pinned in the pull script because
+the manifests key on frame filenames *and* on detection order within each frame;
+`verify_labels.py` runs at the end and will fail loudly if they drift.
+
+Pull never overwrites an existing `labelling/`. That directory is human ground
+truth — somebody looked at all 167 crops and put each one in a folder — and it
+is the expensive part of this study, so push it once corrected.
+
+Clips are Pexels-licensed: free to use, no attribution required, but not
+CC or MIT. Fine as a frozen CI artifact on private infrastructure; do not
+redistribute them as stock content.
 
 ## Scripts
 
diff --git a/scripts/artifacts/pull_artifacts.sh b/scripts/artifacts/pull_artifacts.sh
index 8031ace..d594735 100755
--- a/scripts/artifacts/pull_artifacts.sh
+++ b/scripts/artifacts/pull_artifacts.sh
@@ -11,6 +11,7 @@
 #   scripts/artifacts/pull_artifacts.sh montage-frames <film-slug> [version]
 #   scripts/artifacts/pull_artifacts.sh experiment-data [version]
 #   scripts/artifacts/pull_artifacts.sh report-highlights <name> [version]
+#   scripts/artifacts/pull_artifacts.sh xsource [version]
 # version defaults to "latest" (newest uploaded version, by created_at).
 set -euo pipefail
 
@@ -83,11 +84,71 @@ pull_report_highlight() {
     curl -sf "${DL_BASE}/generic/report-highlights/${version}/${name}" -o "${dest}/${name}"
 }
 
+pull_xsource() {
+    local version="$1"
+    local dest="${REPO_ROOT}/experiments/xsource"
+    echo "=== xsource (version ${version}) ==="
+    mkdir -p "${dest}/clips" "${dest}/frames"
+
+    for clip in 5157339 5157344; do
+        if [ -f "${dest}/clips/${clip}.mp4" ]; then
+            echo "  ${clip}.mp4 already present, skipping"
+        else
+            echo "  fetching ${clip}.mp4..."
+            curl -sf "${DL_BASE}/generic/xsource/${version}/${clip}.mp4" \
+                -o "${dest}/clips/${clip}.mp4" \
+                || { echo "    [warn] ${clip}.mp4 not found at version ${version}" >&2; continue; }
+        fi
+    done
+
+    if [ -d "${dest}/labelling" ]; then
+        echo "  labelling/ already present — NOT overwriting (it is hand-sorted"
+        echo "  ground truth; move it aside first if you really want the remote copy)"
+    else
+        echo "  fetching labelling.zip..."
+        local tmp; tmp="$(mktemp)"
+        curl -sf "${DL_BASE}/generic/xsource/${version}/labelling.zip" -o "$tmp"
+        unzip -qo "$tmp" -d "$dest"
+        rm "$tmp"
+    fi
+
+    # Frames are regenerated rather than shipped: they are ~320 MB of PNG that
+    # ffmpeg reproduces exactly from the clips. The manifests key on these
+    # filenames and on detection order within each frame, so the extraction
+    # settings must match the ones dump_faces.py ran against — hence fps and
+    # frame count are pinned here rather than left to the caller.
+    if ! command -v ffmpeg >/dev/null; then
+        echo "  [warn] ffmpeg not found — frames not regenerated; the study" >&2
+        echo "         scripts will fail until you extract them" >&2
+        return
+    fi
+    for clip in 5157339 5157344; do
+        [ -f "${dest}/clips/${clip}.mp4" ] || continue
+        if [ -f "${dest}/frames/d${clip}_001.png" ]; then
+            echo "  frames for ${clip} already present, skipping"
+            continue
+        fi
+        echo "  extracting frames for ${clip}..."
+        ffmpeg -v error -i "${dest}/clips/${clip}.mp4" -vf fps=2 -frames:v 24 \
+            "${dest}/frames/d${clip}_%03d.png"
+    done
+
+    echo "  verifying the labelled set..."
+    if (cd "$dest" && python3 verify_labels.py >/dev/null 2>&1); then
+        echo "    verify_labels.py passed"
+    else
+        echo "    [warn] verify_labels.py failed — run it directly to see why." >&2
+        echo "           A frame/manifest mismatch means the extraction settings" >&2
+        echo "           differ from the ones the crops were dumped against." >&2
+    fi
+}
+
 if [ $# -eq 0 ]; then
     echo "usage: $0 galleries [version]" >&2
     echo "       $0 montage-frames <film-slug> [version]" >&2
     echo "       $0 experiment-data [version]" >&2
     echo "       $0 report-highlights <name> [version]" >&2
+    echo "       $0 xsource [version]" >&2
     exit 1
 fi
 
@@ -115,8 +176,13 @@ case "$TARGET" in
         [ "$VERSION" = "latest" ] && VERSION="$(resolve_latest_version report-highlights)"
         pull_report_highlight "$VERSION" "$NAME"
         ;;
+    xsource)
+        VERSION="${2:-latest}"
+        [ "$VERSION" = "latest" ] && VERSION="$(resolve_latest_version xsource)"
+        pull_xsource "$VERSION"
+        ;;
     *)
-        echo "unknown target: $TARGET (expected galleries, montage-frames, experiment-data, or report-highlights)" >&2
+        echo "unknown target: $TARGET (expected galleries, montage-frames, experiment-data, report-highlights, or xsource)" >&2
         exit 1
         ;;
 esac
diff --git a/scripts/artifacts/push_artifacts.sh b/scripts/artifacts/push_artifacts.sh
index dff8980..8fe1f1a 100755
--- a/scripts/artifacts/push_artifacts.sh
+++ b/scripts/artifacts/push_artifacts.sh
@@ -12,6 +12,7 @@
 #   scripts/artifacts/push_artifacts.sh montage-frames
 #   scripts/artifacts/push_artifacts.sh experiment-data
 #   scripts/artifacts/push_artifacts.sh report-highlights
+#   scripts/artifacts/push_artifacts.sh xsource
 #   scripts/artifacts/push_artifacts.sh galleries montage-frames experiment-data report-highlights
 #
 # Package layout (owner=dtourolle, repo=scene-actor-extraction):
@@ -109,8 +110,35 @@ push_report_highlights() {
     upload "report-highlights" "germar_beats_xray.jpg" "$src"
 }
 
+push_xsource() {
+    echo "=== xsource (version ${VERSION}) ==="
+    local root="${REPO_ROOT}/experiments/xsource"
+    if [ ! -d "$root/labelling" ]; then
+        echo "  no experiments/xsource/labelling found, skipping" >&2
+        return
+    fi
+
+    # Source recordings. Already compressed, so uploaded as-is rather than zipped.
+    shopt -s nullglob
+    for f in "$root"/clips/*.mp4; do
+        upload "xsource" "$(basename "$f")" "$f"
+    done
+    shopt -u nullglob
+
+    # The hand-sorted crops and their manifests. This is human ground truth and
+    # the expensive part of the study — a person looked at every crop and put it
+    # in a folder. Frames are deliberately NOT pushed: they are deterministic
+    # from the clips, and pulling regenerates them.
+    local tmp; tmp="$(mktemp -d)"
+    trap 'rm -rf "$tmp"' RETURN
+    local zipfile="${tmp}/labelling.zip"
+    (cd "$root" && zip -qr "$zipfile" labelling -x 'labelling/*.html' -x 'labelling/review_*.jpg' \
+        -x 'labelling/verify_*.jpg')
+    upload "xsource" "labelling.zip" "$zipfile"
+}
+
 if [ $# -eq 0 ]; then
-    echo "usage: $0 <galleries|montage-frames|experiment-data|report-highlights> [...]" >&2
+    echo "usage: $0 <galleries|montage-frames|experiment-data|report-highlights|xsource> [...]" >&2
     exit 1
 fi
 
@@ -120,7 +148,8 @@ for target in "$@"; do
         montage-frames)     push_montage_frames ;;
         experiment-data)    push_experiment_data ;;
         report-highlights)  push_report_highlights ;;
-        *) echo "unknown target: $target (expected galleries, montage-frames, experiment-data, or report-highlights)" >&2; exit 1 ;;
+        xsource)            push_xsource ;;
+        *) echo "unknown target: $target (expected galleries, montage-frames, experiment-data, report-highlights, or xsource)" >&2; exit 1 ;;
     esac
 done