If you want to copy the YouTube url on your iPhone, there are a few steps you can take. First, open up Safari and type in the youtube url into the address bar. Then hit enter. You’ll then be taken to a web page that looks like this: Now, paste the youtube url into the text field on the right and hit enter. You’ll then be taken to a web page that looks like this: You should now have a copy of the YouTube url on your iPhone!