Dear people: Well, I am nobody's idea of an opera expert at all, but
I do know that the tune at 0:42 is indeed the Triumphal March from
"Aida" by Verdi. (For example, https://en.wikipedia.org/wiki/Aida 
has a link to a performance).

Also, the tune at 2:14 is the famous Intermezzo Sinfonico from
Mascagni's "Cavalliera Rusticana". (For instance, at
https://www.youtube.com/watch?v=BIQ2D6AIys8 )

I don't know the rest until the ending, from Rossini's "William Tell".

Bob Pinsker
San Diego, California