diff --git a/config.example.toml b/config.example.toml
index 0af6218..8241fcc 100644
--- a/config.example.toml
+++ b/config.example.toml
@@ -23,6 +23,10 @@ runs = "~/SplatWorkshop/runs"
 # Additional folders that are scanned for *_stereo.mp4 recordings.
 extra_recording_dirs = ["~/Downloads", "~/Videos"]
 
+# Program for "Open in video player", e.g. "mpv" or "vlc --fullscreen".
+# Leave empty to use the system default for MP4 files.
+video_player = ""
+
 [frame]
 # SSH target of your Steam Frame. Leave empty to work without the Frame
 # (no downloading of recordings, no copying into the Gaussian XR gallery).
diff --git a/splat_workshop/config.py b/splat_workshop/config.py
index 3aa47e6..c319a92 100644
--- a/splat_workshop/config.py
+++ b/splat_workshop/config.py
@@ -25,6 +25,7 @@ DEFAULTS = {
         "recordings": "~/SplatWorkshop/recordings",
         "runs": "~/SplatWorkshop/runs",
         "extra_recording_dirs": ["~/Downloads", "~/Videos"],
+        "video_player": "",
     },
     "frame": {"host": ""},
     "server": {"port": 8771, "lan": False, "idle_minutes": 20, "language": "auto"},
@@ -48,6 +49,8 @@ class Config:
         self.recordings = path(p["recordings"])
         self.runs = path(p["runs"])
         self.extra_recording_dirs = [path(d) for d in p.get("extra_recording_dirs", [])]
+        # Command for "Open in video player" (e.g. "mpv"); empty = system default via xdg-open
+        self.video_player = shlex.split(p.get("video_player", "")) or ["xdg-open"]
         self.frame_host = os.environ.get("FRAME_HOST", f.get("host", "")).strip()
         self.port = int(os.environ.get("SPLAT_PORT", s["port"]))
         lan = os.environ.get("SPLAT_LAN")
diff --git a/splat_workshop/server.py b/splat_workshop/server.py
index da6c223..29802ed 100644
--- a/splat_workshop/server.py
+++ b/splat_workshop/server.py
@@ -860,7 +860,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
             if not local:
                 e = err("err.not_local")
             else:
-                subprocess.Popen(["xdg-open", local], start_new_session=True,
+                subprocess.Popen([*CFG.video_player, local], start_new_session=True,
                                  stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
         elif path == "/api/open":
             d = scene_dir(p.get("slug", ""))