The Paiste Earth Gong she has is NOT a Planet Gong, but a Sound Creation series Earth Gong, very different. And you should NEVER hit 2 tuning forks against each other, as you can damage them. Otherwise, a decent video.
One thing is to make sure you are using high quality recording gear, especially the mics. I would suggest large diaphragm condenser mics or ribbon mics that can handle the intense vibrations. With my own Gong recordings, we experimented with various…