Merge movies with different resolution on different paths?

I know this works if I have, for example:

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        movies/
        - movie1 - 1080p.mkv
        - movie1 - 2160p.mkv

but what if I have:

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        movies/
        - movie1 - 1080p.mkv
    movies2/
        - movie1 - 2160p.mkv

Because I'm out of space on the driver under "movies". Do I need to have them in the same parent folder?