Helpful Videos
Helpful Videos Obstruction
Here is a collection of short videos, presented in less than 9 minutes, designed to help umpires understand obstruction ("regular" obstruction including considerations of playing distance; third-party obstruction; stick obstruction and when to card).
Helpful Videos Self Pass Video (live action examples)
Here are some examples of legal and illegal actions by attackers and defenders when the self pass is used to restart play. This video does not include an audio track. Click twice to enlarge the video. UPDATE: This rule has changed at all levels since the time that this video was made. The restarter, if he/she decides to dribble the ball instead of passing to a teammate, no longer needs to start with two actions (no separation is needed).