I have a couple of website projects that I am currently working on as a learning exercise & Have noticed in the developer tools that at least two of my projects are Downloading resources Multiple times. I am using firefox developer edition & it is showing as having downloaded the css file at least 7 times, Images and a video are around 20 times aswell as three.js? Is there anyway I can force it to only download once as the items have not changed or been moved in the directory.
Wondering if this is possible either as a header or in the .htaccess or any other available code. Is annoying me & is obviously redundant or not necessary? also is probably effecting page load time, but it just seems pointless to download the same document or resource multiple times?
Any Comments would be appreciated

I have a Vj video loop that I would like to include in my page, I just counted and its downloading it 26 times for some unknown reason.
you can view the page source code at [dev-stock](https://www.dev-stock.club) 

I'm not really sure which tags to put this under as GET requests is not available? Can someone help?