Okay, so you don't even need a socialist system for this, just a moderately sane government. Even here in Estonia, the government hands out funding for cultural projects. Now this is still a capitalist society, so you likely can't get full funding for a big project.

In an actual socialist economy, the government will give you full funding for projects. The actors and everyone else working on a movie or TV show have guaranteed income that's enough to live their lives, guaranteed living accommodations, etc, so they're more likely to do it as a passion project, but they could still be paid as extra motivation. Funding is still required for equipment, etc. Unless you go fully money free as a society, in which case you ask the government to assign equipment to you.

The same people who already make the media. Just cut out the corporate middle-men & shareholders, who soak up all the profit and contribute nothing to the content.

There are a lot of independent creators out there too.

Sometimes it's hard to imagine a reality outside our own.

I just imagine a federated, YouTube-like platform. Except better in literally every single way. You are a member of your local community instance, and thereby connected with every other federated instance throughout the world.