I’m confused about what you are trying to accomplish. You want to start the render queue while in play mode? That is not possible. You will notice when you hit play the “Render(local)” button in the Movie Render Queue greys out. If you want to simply enqueue sequences while in play mode you might be able to (ONLY possible with editor). Since these are editor utility functions, your blueprint must be either Editor Utility Widget or Editor Utility Blueprint.