On one of the videos, the reporter said that the reason the audio on Puentes’s video was so muffled is because the camera was inside a scuba mount. Isn’t that stick the camera was on also scuba gear? It was on his Twitter feed or Facebook page, iirc, where he said he is a spear fisherman.
This is where my ignorance gets in the way. I know nothing about either scuba gear or Go Pro equipment. Hopefully somebody who knows/understands how it all works together will chime in here.