Just record it with your phone's camera (almost typed camera's phone, lol) and there should be a built in youtube app already on most newer phones. Go to the app, sign in if you haven't. The newest version of the app has a little camera icon at the top and if you click it it will pull up your library of videos from your phone's camera. Select away. I suggest making a few test videos (don't have to upload them, but you can if you want) before you go through all that effort of starting the car, walking around it, etc.