Here’s an excellent video of orchestral brass playing. It’s the famous chorale in the 5th movement of Mahler’s 2nd Symphony. Note the trumpet section is made up of the principals of the New York Philharmonic (Philip Smith), Cleveland Orchestra (Michael Sachs), Chicago Symphony Orchestra (Chris Martin), and the Boston Symphony Orchestra (Tom Rolfs).
Here’s another of the opening of Also Sprach Zarathustra. Personnel is slightly different. I really like the conducting of Michael Mulcahy (2nd trombone with the Chicago Symphony Orchestra). Do you?
How about Tchaikovsky’s 4th?