What the Dialogue Mass looked like
This fascinating clip, first broadcast on 25 September 1960 by Radio Canada, shows the beginning of a Pontifical Low Mass for the 16th Sunday after Pentecost celebrated by Bishop Émilien Frenette, Bishop of Saint-Jérôme, in the Studio. The Mass is celebrated as a "Dialogue Mass" versus populum, and the populum confidently bellows out the various responses in Latin.
Everyone knows what to do - the maniple is ready for the end of the Indulgentiam, the servers assist the Bishop ascending the steps by holding the fringe of his alb in ceremonial deference to his office as "Pontifex" and the bugia (hand-held candle) is there right on time for the Introit Miserere mihi Domine. Within a decade, all of this will be rapidly disappearing from the rite.
H/T NLM