diff --git a/public/media/remote-cache/README.md b/public/media/remote-cache/README.md
new file mode 100644
index 0000000..861858a
--- /dev/null
+++ b/public/media/remote-cache/README.md
@@ -0,0 +1,23 @@
+# Remote media cache
+
+Mirrored copies of community-contributed media, cached here so the catalog's
+media loads reliably everywhere (raw.githubusercontent.com and
+huggingface.co are unreachable or unstable from some regions, and HF media
+is served via signed redirects that slow first load).
+
+Files are byte-identical copies of the upstream artifacts. Upstream links and
+licensing live in each behavior descriptor under `registry/behaviors/`
+(`sources` section). Behavior → upstream mapping:
+
+| File                 | Upstream                                                                    |
+| -------------------- | --------------------------------------------------------------------------- |
+| `courier.mp4`        | selinayfilizp/microduck-courier @ `2cd9da8d1` `artifacts/courier-policy-track.mp4` |
+| `courier.gif`        | selinayfilizp/microduck-courier @ `2cd9da8d1` `artifacts/courier-policy.gif`       |
+| `flamingo-cycle.mp4` | RemiFabre/microduck-flamingo-cycle @ `6646428` `media/preview.mp4`           |
+| `rough-walk-e.mp4`   | RemiFabre/microduck-rough-walk-e @ `fa7b27ee` `media/preview.mp4`            |
+| `rough-walk-g.mp4`   | RemiFabre/microduck-rough-walk-g @ `242876a0` `media/preview.mp4`            |
+| `running.mp4`        | HannesVonEssen/microduck-running @ `d839a07c` `media/preview.mp4`            |
+
+If you are an upstream author and want your media removed or updated, open an
+issue or PR — the canonical artifacts remain on your repo; these are caches,
+not forks.
diff --git a/public/media/remote-cache/courier.gif b/public/media/remote-cache/courier.gif
new file mode 100644
index 0000000..d44f2b9
Binary files /dev/null and b/public/media/remote-cache/courier.gif differ
diff --git a/public/media/remote-cache/courier.mp4 b/public/media/remote-cache/courier.mp4
new file mode 100644
index 0000000..5d2096f
Binary files /dev/null and b/public/media/remote-cache/courier.mp4 differ
diff --git a/public/media/remote-cache/flamingo-cycle.mp4 b/public/media/remote-cache/flamingo-cycle.mp4
new file mode 100644
index 0000000..a82f37b
Binary files /dev/null and b/public/media/remote-cache/flamingo-cycle.mp4 differ
diff --git a/public/media/remote-cache/rough-walk-e.mp4 b/public/media/remote-cache/rough-walk-e.mp4
new file mode 100644
index 0000000..1332501
Binary files /dev/null and b/public/media/remote-cache/rough-walk-e.mp4 differ
diff --git a/public/media/remote-cache/rough-walk-g.mp4 b/public/media/remote-cache/rough-walk-g.mp4
new file mode 100644
index 0000000..9d3f4d7
Binary files /dev/null and b/public/media/remote-cache/rough-walk-g.mp4 differ
diff --git a/public/media/remote-cache/running.mp4 b/public/media/remote-cache/running.mp4
new file mode 100644
index 0000000..cf9fe1e
Binary files /dev/null and b/public/media/remote-cache/running.mp4 differ
diff --git a/public/registry.json b/public/registry.json
index 8434a90..a62049d 100644
--- a/public/registry.json
+++ b/public/registry.json
@@ -792,7 +792,7 @@
         }
       },
       "media": {
-        "video_url": "https://huggingface.co/RemiFabre/microduck-flamingo-cycle/resolve/6646428394c6997106d2dc07c1588f20f6fea026/media/preview.mp4",
+        "video_url": "/media/remote-cache/flamingo-cycle.mp4",
         "hero_type": "video",
         "caption": "Microduck balancing on one foot in simulation"
       },
@@ -1094,8 +1094,8 @@
         }
       },
       "media": {
-        "thumbnail_url": "https://raw.githubusercontent.com/selinayfilizp/microduck-courier/2cd9da8d1ecfb850c0ab062654a63007cbd21b9d/artifacts/courier-policy.gif",
-        "video_url": "https://raw.githubusercontent.com/selinayfilizp/microduck-courier/2cd9da8d1ecfb850c0ab062654a63007cbd21b9d/artifacts/courier-policy-track.mp4",
+        "thumbnail_url": "/media/remote-cache/courier.gif",
+        "video_url": "/media/remote-cache/courier.mp4",
         "hero_type": "video",
         "caption": "Tracked simulation rollout of the community Microduck courier policy"
       },
@@ -1171,7 +1171,7 @@
         }
       },
       "media": {
-        "video_url": "https://huggingface.co/HannesVonEssen/microduck-running/resolve/d839a07cd2cb4bdc2850ca72bf00d9b549ec600a/media/preview.mp4",
+        "video_url": "/media/remote-cache/running.mp4",
         "hero_type": "video",
         "caption": "Microduck running in simulation"
       },
@@ -1250,7 +1250,7 @@
         }
       },
       "media": {
-        "video_url": "https://huggingface.co/RemiFabre/microduck-rough-walk-e/resolve/fa7b27eeb5610d3b351362f4bd71691ee8be3d7d/media/preview.mp4",
+        "video_url": "/media/remote-cache/rough-walk-e.mp4",
         "hero_type": "video",
         "caption": "Microduck walking across rough terrain in simulation"
       },
@@ -1329,7 +1329,7 @@
         }
       },
       "media": {
-        "video_url": "https://huggingface.co/RemiFabre/microduck-rough-walk-g/resolve/242876a0aa8b40b702142fb0a5677fd43bc88a4c/media/preview.mp4",
+        "video_url": "/media/remote-cache/rough-walk-g.mp4",
         "hero_type": "video",
         "caption": "Microduck walking across rough terrain in simulation"
       },
diff --git a/registry/behaviors/courier.json b/registry/behaviors/courier.json
index 0fa1f8e..0be88c0 100644
--- a/registry/behaviors/courier.json
+++ b/registry/behaviors/courier.json
@@ -62,10 +62,10 @@
     }
   },
   "media": {
-    "video_url": "https://raw.githubusercontent.com/selinayfilizp/microduck-courier/2cd9da8d1ecfb850c0ab062654a63007cbd21b9d/artifacts/courier-policy-track.mp4",
+    "video_url": "/media/remote-cache/courier.mp4",
     "hero_type": "video",
     "caption": "Tracked simulation rollout of the community Microduck courier policy",
-    "thumbnail_url": "https://raw.githubusercontent.com/selinayfilizp/microduck-courier/2cd9da8d1ecfb850c0ab062654a63007cbd21b9d/artifacts/courier-policy.gif"
+    "thumbnail_url": "/media/remote-cache/courier.gif"
   },
   "sources": {
     "upstream_repo": "https://github.com/selinayfilizp/microduck-courier",
diff --git a/registry/behaviors/flamingo-cycle.json b/registry/behaviors/flamingo-cycle.json
index a3d04d3..82e571b 100644
--- a/registry/behaviors/flamingo-cycle.json
+++ b/registry/behaviors/flamingo-cycle.json
@@ -62,7 +62,7 @@
     }
   },
   "media": {
-    "video_url": "https://huggingface.co/RemiFabre/microduck-flamingo-cycle/resolve/6646428394c6997106d2dc07c1588f20f6fea026/media/preview.mp4",
+    "video_url": "/media/remote-cache/flamingo-cycle.mp4",
     "hero_type": "video",
     "caption": "Microduck balancing on one foot in simulation"
   },
diff --git a/registry/behaviors/rough-walk-e.json b/registry/behaviors/rough-walk-e.json
index 7418cfe..b4560bf 100644
--- a/registry/behaviors/rough-walk-e.json
+++ b/registry/behaviors/rough-walk-e.json
@@ -64,7 +64,7 @@
     }
   },
   "media": {
-    "video_url": "https://huggingface.co/RemiFabre/microduck-rough-walk-e/resolve/fa7b27eeb5610d3b351362f4bd71691ee8be3d7d/media/preview.mp4",
+    "video_url": "/media/remote-cache/rough-walk-e.mp4",
     "hero_type": "video",
     "caption": "Microduck walking across rough terrain in simulation"
   },
diff --git a/registry/behaviors/rough-walk-g.json b/registry/behaviors/rough-walk-g.json
index 842c493..0d42b9f 100644
--- a/registry/behaviors/rough-walk-g.json
+++ b/registry/behaviors/rough-walk-g.json
@@ -64,7 +64,7 @@
     }
   },
   "media": {
-    "video_url": "https://huggingface.co/RemiFabre/microduck-rough-walk-g/resolve/242876a0aa8b40b702142fb0a5677fd43bc88a4c/media/preview.mp4",
+    "video_url": "/media/remote-cache/rough-walk-g.mp4",
     "hero_type": "video",
     "caption": "Microduck walking across rough terrain in simulation"
   },
diff --git a/registry/behaviors/running.json b/registry/behaviors/running.json
index 85c5a8c..21cae20 100644
--- a/registry/behaviors/running.json
+++ b/registry/behaviors/running.json
@@ -61,7 +61,7 @@
     }
   },
   "media": {
-    "video_url": "https://huggingface.co/HannesVonEssen/microduck-running/resolve/d839a07cd2cb4bdc2850ca72bf00d9b549ec600a/media/preview.mp4",
+    "video_url": "/media/remote-cache/running.mp4",
     "hero_type": "video",
     "caption": "Microduck running in simulation"
   },