diff --git a/Copyright b/Copyright
index c72ec4f891..8306b423fe 100644
--- a/Copyright
+++ b/Copyright
@@ -301,14 +301,14 @@ LGPL relicensing status:
     video/out/drm_common.*          LGPL
     video/out/filter_kernels.*      LGPL (BSD)
     video/out/opengl/*              LGPL
-    video/out/vo.c                  hard
-    video/out/vo.h                  hard
+    video/out/vo.c                  LGPL
+    video/out/vo.h                  LGPL
     video/out/vo_caca.c             unknown
     video/out/vo_direct3d.c         unknown
     video/out/vo_drm.c              LGPL
     video/out/vo_image.c            unknown
     video/out/vo_lavc.c             unknown
-    video/out/vo_null.c             unknown
+    video/out/vo_null.c             LGPL
     video/out/vo_opengl.c           LGPL
     video/out/vo_opengl_cb.c        LGPL
     video/out/vo_rpi.c              LGPL
diff --git a/player/video.c b/player/video.c
index 3bbb2dc275..ab7c6f281d 100644
--- a/player/video.c
+++ b/player/video.c
@@ -107,10 +107,6 @@ int video_vf_vo_control(struct vo_chain *vo_c, int vf_cmd, void *data)
     }
 
     switch (vf_cmd) {
-    case VFCTRL_GET_DEINTERLACE:
-        return vo_control(vo_c->vo, VOCTRL_GET_DEINTERLACE, data) == VO_TRUE;
-    case VFCTRL_SET_DEINTERLACE:
-        return vo_control(vo_c->vo, VOCTRL_SET_DEINTERLACE, data) == VO_TRUE;
     case VFCTRL_SET_EQUALIZER: {
         vf_equalizer_t *eq = data;
         if (!vo_c->vo->config_ok)
diff --git a/video/out/vo.c b/video/out/vo.c
index 1b71212f25..79fc4f3bb4 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <stdio.h>
diff --git a/video/out/vo.h b/video/out/vo.h
index 724e03ca41..c59e1b04c8 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -6,18 +6,18 @@
  *
  * This file is part of mpv.
  *
- * mpv is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef MPLAYER_VIDEO_OUT_H
@@ -90,9 +90,6 @@ enum mp_voctrl {
     VOCTRL_KILL_SCREENSAVER,
     VOCTRL_RESTORE_SCREENSAVER,
 
-    VOCTRL_SET_DEINTERLACE,
-    VOCTRL_GET_DEINTERLACE,
-
     // Return or set window size (not-fullscreen mode only - if fullscreened,
     // these must access the not-fullscreened window size only).
     VOCTRL_GET_UNFS_WINDOW_SIZE,        // int[2] (w/h)
diff --git a/video/out/vo_null.c b/video/out/vo_null.c
index fcf8dc9051..a9b1ed12a4 100644
--- a/video/out/vo_null.c
+++ b/video/out/vo_null.c
@@ -5,18 +5,18 @@
  *
  * This file is part of mpv.
  *
- * mpv is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <stdlib.h>