Please take this for what it is. I emailed WDFW for some clarification and this is the response.
Here is the email content:
To whom it may concern,
I have a clarification question regarding the waterfowl regulations. I understand the regs as they pertain to electronic calls and decoys but am curious if it is legal to have a video camera mounted to a shotgun. The camera in question would not have a light, laser, or other type of illumination or targeting ability. It would simply be for recording the hunt from the hunters point of view.
And the reply:
Yes, this would be legal.
Sincerely,
Wildlife Program Customer Service
(360) 902-2515
I wish the reply would have been singed with a name but I guess it is what it is. Happy hunting!