How do i apply compositor nodes to a animation render?

So i’m working on an animation test for my youtube channel, and i need to add motion blur and fog glow.
i have the nodes set up, but i’m pretty sure i’m doing something wrong.

what should i do to make it output the render files?

You cannot send the contents of the current scene’s VSE to the Compositor. But you could send the compositor output to another scene’s VSE, as a scene strip.

Recently, i got stuck up with the same issue. I composited my scene. Rendered the animation by selecting PNG instead of video. then created a new VSE scene, added all my images (3 different animations) and made a video out of it.