Hello, I have added a comment to the video warning about this. I sincerely hope your stylus and cartridge were not damaged! The Cart in the video was a Shure Pro-9 with a N-44 Stylus. The power was obviously unplugged to the turntable so as to prevent it from rotating.
I wanted to see if my cart would pick up the ipads speaker vibration. I expected something to happen, but not the distortion-less playback that I got! The cart is magnetic and placed on top of where the speaker is located!