Searched for high volley videos and found these. Includes a well done overall volley discussion with videos from tennisplayer.net.
HIGH VOLLEY VIDEOS
High forehand volley article with video links. Jeff Cooper.
Brent Abel high forehand volley. (2010)
Brent Abel high forehand volley. (2009)
Brent Abel high backhand volley.
Brent Abel high backhand volley, 2 problems, 2 solutions.
High Forehand Volley, Elisabet Mateos
Positioning for a High Volley
High Backhand Volley.
Aggressive Forehand High Volley. Left leg forward to meet the shot.
VOLLEYS IN GENERAL
3 Things for an Accurate Volley.
Tennisplayer.net Volleys Article with Videos.
I'll have to review the videos as there's a lot of variety and the common threads weren't all clear to me.
Do any of the instructions seem better than the others? Disagree with any of the techniques recommended?