I think there's one problem left.

Doesn't VDR try to create the "plugins" subdir?

VDR runs usually as user. Most distribution maintainer will give VDR write permission for the cache dir and the config dir. But not for the resource dir.

To prevent these permission problems I think it's neccessary to change the Makefile from

install-dirs:
    @mkdir -p $(DESTDIR)$(VIDEODIR)
    @mkdir -p $(DESTDIR)$(CONFDIR)
    @mkdir -p $(DESTDIR)$(RESDIR)
    @mkdir -p $(DESTDIR)$(CACHEDIR)

to

install-dirs:
    @mkdir -p $(DESTDIR)$(VIDEODIR)
    @mkdir -p $(DESTDIR)$(CONFDIR)/plugins
    @mkdir -p $(DESTDIR)$(RESDIR)/plugins
    @mkdir -p $(DESTDIR)$(CACHEDIR)/plugins

or at least

install-dirs:
    @mkdir -p $(DESTDIR)$(VIDEODIR)
    @mkdir -p $(DESTDIR)$(CONFDIR)
    @mkdir -p $(DESTDIR)$(RESDIR)/plugins
    @mkdir -p $(DESTDIR)$(CACHEDIR)