Some people get upset when using the clip mechanism because of potential harm to clothing.
If you notice the caption is excessively long, ask the permission of all the attorneys present if you may shorten it for the record by reading enough to identify the principals. The attorneys may appreciate the suggestion. You are asked by an attorney to play a videotape during the deposition. Bring the situation to the attorney's attention. For your own piece of mind, inform the attorney of the danger of accidentally recording over the material.