These dash cams can automatically record live videos as long as you are on the road.It is crucial to select the right camera with right specification and features based on your requirement and budget.
See Create a Transparent Signature Stamp and Flatten the stamp with a free Action.
Most late model laptops have a webcam, so this method can produce acceptable signature images.
Even better, in my testing, this method produced a signature stamp without a background!
One method you can use to sign your name is to use one of the included Script fonts.
There are four choices and here are some samples, below.