Film Hunger Games

No
and not after that either.
and this for (at least) 50 years.

Uh... Why 50 years?

Isn't it just to ensure that a work enters the public domain?

And normally no... Or very shortly before, according to the VOD offers.

Well, I'm not really sure anymore and I admit I'm too lazy to look it up,
but it's either 50 or 80
I think at one point, it was 50, but the lobbies were trying to push it to 80, among other reasons because there were a bunch of significant works nearing expiration.
Apparently, recent news (the "War of the Buttons" just went public, which is why two films were released within a few days of each other), suggests it's 100 years for a book...

Afterwards, the value might be different depending on the country, the type of work, etc...

To answer Pikoute:
It's the period after which a work enters the public domain, and the author (and their descendants) no longer have rights over the work.
For example: you have the right to download the book "The War of the Buttons" online legally.
The same goes for a score by Mozart or Bach (but not a CD recorded by an artist 15 years ago playing that score).

And even on VOD, it will never be completely free; you'll always have to pay at least a subscription.