This is a better video, without the audio issues: https://www.youtube.com/watch?v=SNeVaadNHg8
Thanks. I was noticing that as well. It does clear up after a bit. I wonder what caused that.
Actually, the video I linked has delayed audio. Ahahaha, oh well.
I didn't watch it yesterday, but they grabbed me at the beginning with some amazing accessibility features. Worth watching the first bit for some interesting tidbits.