The short version
As long as you choose nothing in the cookie notice, I measure without cookies. Nothing goes onto your device and I cannot recognise you. That way of measuring needs no consent, so I do it straight away. Otherwise I am left with a hole in my numbers.
Click "Essential only" and it stays exactly like that. Only your choice itself is remembered.
Click "Accept" and I set a cookie, recognise you on a next visit, and record your visit as a screen recording.