So, there is a 4th location to change VDR_VIDEO_DIR...
I'm resuming, in my System there are the following 4 locations for a change:
1) Options in VDR Backend
2) /storage/.kodi/userdata/addon_data/service.multimedia.vdr-addon/settings.xml
3) /storage/.kodi/addons/service.multimedia.vdr-addon/resources/settings.xml
4) /storage/.kodi/addons/service.multimedia.vdr-addon/settings-default.xml
I editted --- only --- Nr. 2. After Reboot I saw, this changed automaticly 1) to the new Video Dir. But the result is the same: VDR starts only 'Planing' the Record, but it doesn't start the record.
I then also changed the Vido Dir in Files 3) an 4), but no success too.
Back to the '/etc/vdr/conf.d/00-vdr.conf' (Link in #4), which is not in my System.
I found 2 Files, which seem to start vdr Backend:
/storage/.kodi/addons/service.multimedia.vdr-addon/bin/vdr.start
/storage/.kodi/addons/service.multimedia.vdr-addon/bin/vdr.bin
/storage/.kodi/addons/service.multimedia.vdr-addon/bin/vdr.bin --showargs
vdr: can't read arguments from directory: /etc/vdr/conf.d
-> vdr seems to look for config-Files in /etc/vdr/conf.d.
I would like to test this too, but /etc is read only and I find no way, to create a config File there