My primary practice is accounting & taxation, including trust & estate, some of which I am executor or administrator.
One decedent had a few wills with bunch of codicils.
Between improperly-executed, improperly-witnessed and solely-notarized document, the estate ended up back at the first, original will - 10 years of changes would never see the NY Surrogate's Court.
Wills are no place for the newbie. An improperly executed will be rejected, only after the signer is no longer available to correct the error. The signer's wishes may end up being ignored.
It is not practice of law to recommend that an attorney be consulted on the document. Recommending the number or qualification of witnesses, however, plays on the wrong side of the line.
However, with smartphones ubiquitous, some parties have arranged for someone to record the execution of a will (obviously, politely seeking permission from those present, including medical staff) to provide context in the future; this is not an evaluation of evidentiary value, just an observation.
If I have a PoA signing and competency or duress is at issue, I will ask to record for my own records, so I can defend civil or criminal accusation. If not, I probably walk away.
The risk such a signing represents should be compensated accordingly.