His Excellency Bishop Wiliamson recently conferred full and conditional Confirmations in Post Falls, Idaho on February 25th of this year. The above video is the sermon from those Confirmations. You will recall that Bishop Williamson is no longer a bishop of the Society of St. Pius X but has instead attached himself to the so called "Society of St Pius X of the Strict Observance".
Regardless, Bishop Williamson is undoubtedly a validly consecrated bishop of the Catholic Church. Not even the Vatican can deny this - and they never have.