The Two What's of Scouting
What - the other team did
When - the other team did it
Why - the other team did what they did
What - the other team will do in a given situation
Quite often when we scout we only annotate what the other team did. But the context of 'when' they did it provides a lot more information. Time coded information can help a lot with this. These things combined will, hopefully, resonate and you will be able to work out 'why' they did it. This might be because of an individual tendency, because of a technical 'hitch', a mental/emotional issue, or, if you are good (and/or lucky) it will help you understand the philosophy of what they are doing.
Even this doesn't help the coach in itself. Understanding Why is only of benefit to your team if you can use this understanding to work out WHAT will happen in particular situations during the team, in order to exploit them.