is that what you are going to say to the FAA / FSDO if they question you?
if you are a member of AOPA, check with their legal service.
Yes.... This FARS for part 91 (which I operate under) is very, very clear.
PIC has final say (read #5) on allowable electronic devices in the reference provided
On Part 121/135 ops, the "operator" is the company that owns the operating certificate. They're the ones who get to call the shots when it comes down to what can and cannot be used.
For Part 91 you are correct. I have videotaped a couple of my flights and never had any issue with the avionics. I've had more problems with generators and strobes causing noise in the intercom or radios than anything else I've ever brought with me...including cell phones!