Cant upload HTML5 game to any site

I trying to upload y html5 game to 3 different sites: itch.io; newgrounds; kongregate. On none of them it works.
I did tried to found answer on my question, but non of the topicks helpd me, or made me understand how to do this.

The game can launch OK on the “local server”.

Made evrything like that tutoial said

Also found these tutorial:

https://forums.unrealengine.com/development-discussion/html5-development/73947-upload-html5-game-to-itch-io

"-Package your project as normal, make sure that it only has one level because level changing/traveling doesn’t work very well.
-Unpack all the .gz files.
-Rename the .html file to index.html.
-Open it with a text editor like Notepad or Notepad++ (the one I used).
-Search all the .gz and delete them, there are 5.
-There are 3 links at the start, change http to https.
-There is a line that says: filehostargument = “’ -filehostIp=http:// I didn’t change it and it works, but it also works with https.
-Zip everything except “Readme.txt”, “HTML5LaunchHelper.exe” and “RunMacHTML5LaunchHelper.command”. It doesn’t matter the level of compression, I chose Ultra in PeaZip.
-Upload the zip file to itch.io and check “This file will be played in the browser”.
-I got a “Too many files in zip” error which I fixed by moving the zip up to the top, making it the first file and being sure is the only one with “This file will be played in the browser” checked.
-Play around with the viewport dimensions, depending of what you choose the game will be displayed differently.
-Save and check your page, it should load it.”

But cant follow some steps becouse i lack of undestanding.

-Unpack all the .gz files. Dont understand what this is mean.

-Search all the .gz and delete them, there are 5. I found only one line, it sais…// If true, serve out ‘UE4Game.data.gz’, if false, serve out ‘UE4Game.data’., but this is only one .gz file there, i changed him.

-There are 3 links at the start, change http to https. There no links At start, only in the center, and they alrady have https.

So im staggered hard here. Cant understand what am i missing.

SO HOW DO I UPLOAD THE GAME TO ONE OF THESE SITES? THIS IS SHOULD BE TOO DIFFICULT, RIGHT?)
there is no videos of this… helllpp…
Can someone help me, pls