How to render and export niagara vfx as short video?

Hello. I’m new in UE4. So practicing with Niagara for around 25-30 hrs already, and want to share one effect with my friend.
Google didn’t see anything with this question.
Can you explain to me, please? How I can render the effect of what I did and how I can do a short video for 15 seconds? Right now I use my phone camera to record animation in the viewport, but the quality there is too low.

Thank you.

You can use Sequencer, add a camera and recorder

what about this?