No. The sale of a property is not on the list of acts that Article 17 ter of the Spanish Notarial Law (Law 11/2023) allows a notary to authorise by video conference. The deed is signed in person before a notary in Spain, by the buyer or the seller or, with a special power of attorney, by our representative on their behalf.
What can be signed by video conference is the special power of attorney for that sale, because it is a power for a specific act. From abroad it can also be signed at the Spanish consulate or before a local notary with an apostille.