Marty Smith joins Ice Cube, Allen Iverson and Jason Williams to shoot some hoops and discuss what BIG3 basketball is all about. Watch ESPN on YouTube TV: .<br>Thanks to everyone for making yesterdays Media Day in NYC a massive success. Check the recap out and watch it all go down Monday, 8p ET, only on FS1.<br>Subscribe here <br>Allen Iverson, Kenyon Martin, Chauncey Billups and Stephen Jackson are among a group of retired NBA players who have committed to participating in a 3-on-3 .