Years ago, maybe in the early seventies I attended a Gretch trade show. This man sat with a Gretch guitar on his lap facing up and played as a piano player would. Left hand chords or bass line, and melody and fill ins with his right.

There was another gentlemen who played an instrument called the Stick. If I remember correctly he played the Stick in the same manor but the instrument was upright.

In order for them to use this method of playing the guitar had to have raised frets with low action. I never gave this a try because I love playing guitar just as it was designed to play. (Preference)

John C.
PS, the video works just fine.