Having been part of negotiations with dozens of musicians concerning broadcasts of performances, I can say most were concerned with the future dispersal of the material and some declined. The contracts specified a one time broadcast and copyright protections. You are free to interpret the wishes of the artists and parse these against your interpretation of the legalities.
Folks mentioned above include McCoy Tyner, Max Roach, Stanley Turrentine, Freddie Hubbard, Earl Hines, Benny Carter, Benny Goodman, Herbie Hancock, Miles Davis, Anthony Braxton , Art Hodes, Sarah Vaughan, Lester Bowie, Cecil Taylor, Bud Freeman, Betty Carter, Jimmy Smith, Steve Lacy, Ahmad Jamal, Dizzy Gillespie, etc. I think you get the idea.