The answer is found at 2 minutes 40 seconds
Please, if you have had loved ones who have died, pray for them every day. Offer up your prayers, works, joys and sufferings of every day for all of the Holy Souls in Purgatory. The greatest benefit for a soul in Purgatory is to offer a Mass for them.
“Mercy, my God, mercy! Descend, O Precious Blood, and deliver these souls from their prison. Poor Souls! you suffer so cruelly, and yet you are content and cheerful. The dungeons of the martyrs in comparison with these were gardens of delight. Nevertheless there are others still deeper. How happy should I esteem myself were I not obliged to go down into them.” ~St. Mary Magdalene de Pazzi crying aloud in lamentation