Dave,
I have since adjusted the way I make highlight videos for athletes using the velocity. I set my freeze frame (0% Velocity) at the start of the clip. Set the keyframe to HOLD, then set a 100% Velocity keyframe after 1 second (or however long you want the keyframe to last.
That part you knew, but this is the next step:
Press Ctrl+C to copy the event
Click on the next event…right click…SELECT EVENTS TO END
Then Right Click again on the selected event and…PASTE EVENT ATTRIBUTES
This will apply a 1 second freeze frame to the beginning of all your events.