Lukasz are you wanting more than one image to show up per slide? If so, you would want to have to have more than one image element per slide. Your video is showing the expected behavior of the native Webflow slider.
If you want more advanced controls, you'll have to use a custom slider library like splidejs or swiperjs.
You can also check out https://www.resliders.com/ - which is built using the Relume components and SwiperJS/SlickJS.
