With regard to shooting video, I started out with a Drift sport cam mounted to my Elev-8 but unless I flew under really cam conditions, the jerkiness was really annoying, as well as the jello effect from aircraft vibrations.
Later, I bought and installed a Tarot 2 axis gimbal and a GoPro Hero4 camera - also installed a 500 mW video transmitter so I could monitor the video while flying. MY aircraft has an APM flight controller, so I can have the copter fly autonomously (fly a waypoint mission that I created), so I could concentrate of the video w/o having to worry about flying the aircraft at the same time. I got much better videos, but like you, I had a tendency to yaw too quickly, and have since learned to turn the aircraft SLOWLY while shooting video.
Good luck and keep flying - you'll get better with experience! look forward to seeing some of your aerial videos.