I'm fairly strict on copyright myself. If anything, I'd restrict it even further to close the "Fair Use" loopholes that YouTubers use to justify showing half a movie just because they talk over some of it. The "free advertising" argument and all the rest are really self-serving nonsense from a handful of people who want to keep their channels anyway.
Personally, I'd like to make copyright intact for truly important pieces of art more or less indefinitely. I mean, it'll be great when, say, the Marx Brothers movies make their way so that anyone could see them at any time and maybe they can get new life and a few more people can appreciate them. Truth be told, the financial value for most movies under copyright is minimal enough that the value to the holders far outweighs the value to the public and even to the artists themselves in keeping them covered. I mean, would it benefit Jane Austen if I couldn't go to Gutenberg.org and read Mansfield Park whenever I wanted because some publishing house has kept the rights under lock and key? It may not hurt Pride and Prejudice much, but it would make her less popular work much less accessible.
On the other hand, it won't be so many years until films like Snow White, The Wizard of Oz, or Gone With the Wind enter public domain themselves. These movies still hold fairly significant value and it doesn't hurt the public or the artists because the works haven't dimmed with the neglect of their rightsholders keeping them just for the sake of it. In fact, they continue to receive corporate backing in order to keep them fresh in the public's mind. Same thing goes with literature. The first version of the Hobbit will fall into public domain around the same time as those movies with Animal Farm not far behind. The Great Gatsby continues to do better than most modern books, but will go into public domain in just a couple of years.
For that reason, I would suggest that copyright protection be continue to be extendable, but for the fee to become increasingly prohibitive as time goes on. Classics that still contain significant value and that remain in print can remain in private hands but the forgotten classics can re-enter the world to see if they can find a new audience.
I think it could be based on application. If a studio is just churning out new efitions of an old movie, and anyone involved in making it is long dead, that should go public domain.
But if somebody is actively using IP in new ways-- like say how DC continues to evolve and make new and original Batman stories, they should be able to extend copyright.