It’s in a blueprint, but it should work from the level bp, too.
Just added it as a component with the media player variable set. That’s it.
This is the same thing but done in the level blueprint (either one works):
Using a reference to the actor:
Using a tag (you need to add a tag to the actor for this to work):
You can’t access it directly because you’re adding the component to an actor in the level, not the class, so it’s not part of the class (same as adding it at runtime). This is why you have to use the “Get Component” node.