Its very Simple, what you need to do is,
just call web viewer to go to a website by adding view-source: in front of the url
for example -
is it possible to change the content before viewing? Thing like [content] and changing the content?
not possible… you cant change any website content unless you have admin privilege. but its not that easy.
I mean changing the content once received and not the web content. For example: I have a file in my assets with the content [content] I would like to read the content and change the [content], I don’t know if I was clear enough.
Yes… You are not clear enough 
is it possible to copy all code with blocks?
might be possible… but i haven’t tried any method yet…
Yes is possible but get the result is diferent.
I work with youtube to get link live stream. To get the right content I need to set link like desktop.
www.youtube.com/ into your app m.youtube.com/ and the souce code is diferent. I’m check this many times
almost 12 hours I tried to be able to copy the code and put it in the label. but there were no results. 
Please you can show that you have tried ??
I deleted it, I even tried using a web component, but I have a problem with charset that is not supported on kodular.
The webpage that I want the content to use is to use Windows-1256 charset instead of Utf-8.
You can post link to test ???
I tried it but got a problem on charset which is not supported by kodular.
I want to get this web content الموسوعة الشاملة - إجابة النداء
I think your using response code instead of response content
You have problems with Arabic characters ???
Ok.. i do some test for you.
Please wait
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thank you friend, glad to hear that.
I tried it, but it didn’t work