Ì stumbled upon this sketch. I love the part the orchestra is about to play at 4:40. Is this something they came up with for this performance or is it a well known piece of music I don't know about? I'm not familiar with classical music.
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- "Questions seeking to identify a song/sample/artist/etc: a) need enough objective detail to be answerable; b) show evidence of effort and research; c) if a link to a sound file is included, also add a description of the song. Please add as much detail as possible." – Bebs, Richard, Dom
It's Beethoven's Egmont Overture. It's a pretty well-known piece among classical musicians, but the layperson likely won't recognize it. (But note that this was filmed in Germany in 1978, so a lot of the audience may have recognized it.)
It's a great piece. I linked you to the same part (the ending), but definitely check out the whole thing!
Edit: For completion's sake, earlier in the video they play Beethoven's Coriolan Overture.