I love that I get to play on various soundtracks in my work. Often I record from my home recording studio, for TV/film/media composers, DJs, etc. and I now co-run Real Brass (an online brass session service), providing trumpet/trombone/saxophone/horn/tuba tracks for various recordings, from TV commercials, film soundtracks, video game soundtracks, to live theatre show backing tracks.
I also do a lot of session work in various recording studios around London. This TV commercial was for Jim Hustwit, who I have recorded for a few times, and it was a great fun funky track to play.
(Watch this space for an animated film soundtrack I played on too.. coming soon!)