In the next video, you will see a funny interpretation of Bo Rhap made by an argentinian classical music's expert called Marcelo Arce. He has invited to a morning radio show, here's the audio. link
(Please, turn the subtitles mode on).
He talks a lot of rubbish, like an hypothetical Queen's Iran tour and Freddie writing a Bo Rhap score for 300 musicians (WTF!!!). But he also says some interesting things, specially about the operatic section of the song. I read somewhere that Freddie did a lot of research for his mini opera. The guy mentioned some quotes from famous operas.
Please, take a look if you want and share your opinions.
Sorry for my poor English. Cheers!!