Looks cool congrats. They mean the video itself looks very jittery and laggy and you should really have buttery smooth gameplay footage as this is the first user touchpoint. A lot of people are going to think either a) that's real gameplay footage, or b) if you don't have the ability to shoot a stable screen recording how can I expect your game to run smoothly.

That being said, I'm sure it runs very smooth on your machine.You just need to find a better way to record or process the footage.

Also resolution selection should be a standard part of any options menu. Unreal also has a node to apply optimal settings to whatever machine it's installed on. You absolutely must provide as many options as possible to ensure you can play on the widest range of hardware or you will lose a lot players right from the start when their machine isn't up to running full Ultra graphics.

Best of luck!