Blast.... AFAIK... recording in public..... **SNIP** Even the 'audio' portion as it is IN PUBLIC. Hence no expectation...... Just my 2c.
Several legal websites mention that in some states you need to let passengers, mechanics, and other people who may be in your vehicle know that they are being recorded (audio). My understanding was it used to be illegal in TX but that's been changed. I need to dig into this more.
-Blast