Portable Video Recorder How To Convert A Webcam Into A Portable Video Recorder?

How to convert a webcam into a portable video recorder? - portable video recorder

I have a Logitech USB webcam and want to convert typical for me to get on a rocket model. Is there a good online resource to me exactly what I will not show.

I want to do the following:

1. Conversion of feed energy to the battery (instead of USB)
2. recorded video stored on an SD or microSD.

Thanks