Our association has a subscription to HUDL and most of our schools post video. I find it very helpful for reviewing our performance in last week's game. The schools tend to start the film a few seconds prior to the snap and stop a few seconds after the whistle. Film is almost always from the press box, but we occasionally get an EZ view as well. It's best for viewing the HL, since the press box camera is pointed right at him. The U is often in the picture as well. The R, on passing plays, but not really after the ball is released. The BJ only on pass plays. The LJ is available sometimes, and buried behind the coaching staff and substitutes other times. So we can get an indication of hustle, and mechanics, during the live ball, but we get nothing on dead ball officiating or penalty administration. But it's still worth an hour or two of my time to look and point out things that any of us could improve on. When our HL joined our crew 3 years ago, this was invaluable. We looked at every single play and it was a fantastic teaching opportunity.
I don't spend much time scouting our upcoming teams. I quickly look for the obvious - is the QB right or left handed? Are the kickers right or left footed? But the level of competition varies greatly week-to-week, so I'm not trying to analyze or spot tendencies beyond "they threw more than they ran" or vice versa.