If you out your videos in a Quicktime .MOV file, you can put the intro in a separate file too, which can be placed anywhere (I think relative paths work too), y

If you out your videos in a Quicktime .MOV file, you can put the intro in a separate file too, which can be placed anywhere (I think relative paths work too), you can even put a URL in there to load it from a server somewhere. Alternately, you could decompress the intro frames - that might get ZFS dedup working, if the length of the file header is the same with all episodes.