>"New Release Videos for Subscribers" (note no final "s" in "Release") - in effect "new release" becomes a portmanteau adjective.
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>If you use "Subscribers' Videos" it could suggest that the vids are BY the subscribers, not FOR.
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>If you want to keep it short, then I'd suggest:
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>"Subscriber New Release Videos".

Thanks, I decided to keep it short with "New Releases - Subscribers".