You should contact the guys who live streaming at the "24 Hours of Lemons" events. They sometime have streaming in-car setups and it works great.
You'll have to do some research to find them but here's somewhere to start.
Current: SBM X5d, SPEC E46 racecar, Black FJ Cruiser, 1970 240Z
Former: '11 MCB E90 M3, 2011 Lotus Exige, 2003 350Z, 2002 WRX, 1996 Supra turbo, 1984 320i, 1987 E28 M5