No it's not. It's trivial to recognize a PVC if you see one, but it's a lot harder to rule out AFib.

To recognize a PVC at the frequency mentioned, you'd need to see much less than a minute of ECG data. You could see AFib in the same length of data, if the data is of good quality, but it can occur episodically, so the 24 Hour ECG is the right call.

I have only limited cardiological knowledge, especially regarding Humans, but at least in my model of cardiac pathology PVCs and AFib aren't mutually exclusive.