fix: mpv in verify_sync

verify_sync.py

@@ -349,7 +349,6 @@ class VerifyWindow(QtWidgets.QMainWindow):
         """Set up mpv player embedded in the video container widget."""
         self.mpv_player = mpv.MPV(
             wid=str(int(self.video_container.winId())),
-            vo="x11",
             input_default_bindings=False,
             input_vo_keyboard=False,
             cursor_autohide=False,