Pro records at 1080p, so small text survives
At 720p your 1920-wide window gets squeezed to 1280 on the way out, which is where code and UI labels go soft. Pro keeps the full 1080p and lets a take run ten minutes instead of five. $6 a month, and you still don't make an account.
Buy ProThe key is shown on the page you land on after checkout. It goes into the extension, under the Record button.