The best coaches in every sport realises that players need to keep things simple and uncluttered in their minds. So they play without conscious thought and play in the moment. Which coincidentally is the reason drills and patterns of play are used by the top coaches of all sports. So the situation is familiar to the player. The players body just does what it knows. There is no overriding ego sitting ontop of the mind during the split second between hits.
You cannot get much better as a player watching videos. You can however get much better if you have a coach that watches videos of your technique and game play. The job of the player is to keep it simple in a complex dynamic situation of the point in a tennis match.
Have you guys seen the video of djokovic teaching how to serve? He says its all in the wrist snap. High speed video of top pros show its really not about snapping the wrist. But that is what djokos coach used to elicit a certain performance from him. So djoko thinks its because he snaps his wrists.