@sonicjoy, the links don’t work because the second occurrence of "http" in each link (or "https" in some cases, in that position) is not followed by a colon.
Also, the first occurrence of "http://" in each link should not be there, although it is not present in the actual URL underlying the visible link, which is what is used by the web browser program. That first "http://" appears in the visible link because the "insert URL" button above the response box inserts it by default (as you can see when that button is clicked), but although it is not the reason your links don’t work it would be best to delete it before pasting the URL into that box.
And in fact with modern browser programs it isn’t necessary to even use that box, unless you want to highlight some text in your post and make it clickable,
like this. Otherwise, just paste the URL directly into the post.
Regards,
-- Al