In the clip I recognise the following:
The count and countess of Paris - who seem to be the chief mourners.
Isabelle, Duchess of Guise? Or is it her daughter Anne of Aosta?
The Duke of Braganza
Princess Margherita of Aosta, now Archduchess Robert
Princess M. Cristina of Aosta, now Pss of the Two Sicilies
I do not recognise the others, but I suppose the sisters of the count of Paris should be among them. I wonder if the young boy is Prince Michel of Greece or perhaps the present Duke of Aosta.
As written in the article by Regina:
Queen Amelia of Portugal
The first funeral service took place at the cathedral of St. Louis in Paris, in the presence of several members of the French and Portuguese royal families. On 26 November the Queen's body departed for Portugal. By a personal order of Salazar, Amelia received the ceremonies and honours of a reigning Queen. No one expected that so many people would be on the streets of Lisbon to follow the Queen’s last journey to her tomb. The unexpected number of people who went to São Vicente de Fora to pay their respects made the government decide to keep her body on view for thirty days instead of the initial three! Through the glass window of her coffin, it was possible to see the Queen, her hands and face as white as marble in contrast to her black dress, the same dress she was wearing on the day her husband and son were murdered. Through the years she had kept this dress, stained with their blood, to wear at her own funeral. In March 1952, she was laid to rest in a tomb which resembled the tombs of her husband and elder son. All of them were made of marble from the village at her beloved Vila Viçosa. On the sides of her tomb, the inscription says the most true thing ever written about her: "Aqui descansa em Deus, D. Amelia de Orleães e Bragança, rainha no trono na caridade e na dor”. – “Here rests in God, D. Amelia of Orléans and Bragança, Queen on the Throne, in Charity and in Pain.”