The upload runs while you record. Pressing stop is the last thing you have to do, and by then the link is already on your clipboard.
Free up to 5 minutes. There's no account.
Chrome asks which tab, window or screen to share.
Your mic goes in once you've granted it. Tab audio comes from the checkbox in Chrome's own picker.
The link goes on your clipboard when you press stop. A five-minute recording doesn't cost you five more minutes of waiting, because there is nothing left to send.