Most libraries want to know if the media is damaged so they can replace it. Your friend can also put holds on things. Some library services also have streaming services, and there are free streaming services as well. PBS has a free streaming service, although I think parts of it are ad supported
... and don't you all have interlibrary borrowing too? This system is 50+ years old [1], surely it can't be the only one around. Request a title from your local library website and it shows up at your local library a few days later regardless of which library actually holds it. Return at any library, it will always find its way back to the right place.
We also have reciprocal borrowing privileges at many libraries that aren't in the network. You can always find a DVD you want!