Very slow speeds during first load

Hi, just wondering how I can optimize my website better to load quicker. Quite new to creating websites and this is still just a draft but any advice would be much appreciated, thanks!

Here’s the read only page:

Maybe it’s because you have a super long video with hi resolution , so it’s super heavy, and super larges image. For example this one The image is 1900 width 470k. I anderstand that you want a super high quality on larger devices. But you have to pay the price. Maybe you shoult try to use diferent image size on diferents sceensize/breakpoint and compress the video. Thre is some SASS on the web for that.