How much is too much?

ALL OF IT. And its coaches fault.
The only thing kids ever with any consistency with any of it is make highlite tapes. What, why are they are watching? Why is what is on the paper important?
Its mandarin chinese to them. It is as true here as it was at my first job.
We assume kids watch football, much less play football. Do you watch what kids are doing? I guarantee you they are not watching full college/nfl game. And never have. And you think they are going to watch hudl and comeback and say they are in under and whatever bleeping coverage you want? ITS SILLY. You can say its an under defense, “what the bleep does that mean?”

Coach walking up to a group of defensive players on the sideline before practice...

Coach: "Here are the scouting reports we have been working on all weekend, guys. Let me pass them out to you and this is for study"

Player: "Where do you want me to align, what am I looking for, and what do you want me to do?"

Coach: "It's all there, just read through and study."

Coach walks away to begin practice.

Player: "I'm going fishing this weekend, you guys want to come along?"

Upcoming opponent film- Yes, we show it in conjunction to a scouting report. But there are a couple things with this, you don't just show it to them and expect them to learn. You have to teach them how to watch film, and not just be a fan. To study their opponent and see what things look like and how to translate it on to the field.
Also, don't just let the film play, have the plays set up to correlate with the scouting report to match what you want them to see, and trim it down so they can best learn what to prepare for.

Cut-ups for position- If you got enough quality coaches to break it down and show film this way then yes. But they must be able to present film correctly. Otherwise no.

Scouting Report- Yes, but once again this isnt just throwing out pictures of all the things they do. Limit it to things that the players can actually use. Top formations & plays, and any useful and heavy tendencies. Limit it to what you could teach in about 30-45 min (in conjunction with films).

Position summary sheet for opponent- Probably not, anything pertinent delivered this way would be handled above (in film and scouting report).

Roster/depth chart- Same as above

I know there are a number of coaches who deride this as extra work we throw at kids that they won't pay attention to, but I have seen it often be a benefit to teams and that most kids will take to this stuff if chunked up correctly and presented in an understandable/digestible manner.

I once worked for a coach who didn't want to do this and claimed 'the kids we had arent the type that could handle it'. I voluntarily did it on my own (with his knowledge) and by mid season the kids were begging for more, talking mid game how the keys were spot on, and how much they liked 'em.

Sure some kids will just zone out and ignore it, but we shouldn't dull the diamonds just to appease the others. Just make sure you present it correctly and don't just throw out loads of info and expect it to be absorbed.

Just for fun though, while that factoid isn't, I suppose one could argue that setting the expectation of level of preparation he expects is important. 

I agree, I wouldn't care too much about that either LOL. 

I think it depends on the "team/players/commitment".

The best team I ever coached on had players who watched football, had played football for a long time, who loved to compete and wanted to win. The HC was in the building and would had a small room between his classroom and another teachers classroom. He would cover the windows with paper, call the office and request certain students to come to his office, and the for the period those guys (seniors mostly) would break down film and truly study it. Those same dudes would sometimes show up at my house to watch film with me. They won a lot of games.

I have also had teams of kids who just were not winners. Hell, one week we are playing are most hated rival so practice is gonna be intense all week (in theory). By Wednesday I asked one of our senior "leaders" how much film he had watched and he asked "Who are we even playing this week"...needless t say my head exploded. 

In other words, you can't force kids to do what we want them to do. If you do, most of them will just breeze thru it and really not get the info they need. Only those who just are dying to win or even want to compete and be the best will actually "study". 

Just my experience and opinion. 

Honestly at this point in my career I know they will never ever ever take it as serious as we do. Ever. I didn't share a ton of stuff with the team. Break down the ODK, formation, play, and play type in HUDL so they can sort through if they want. One page formation sheet, one sheet top runs, one sheet top passes. If there were any dead give a ways then share that too. Install game plan all week in practice.

Never felt the need for a 20 page report as the only thing that would do is create more trash to throw out during the week as you find them scattered all over the locker room. Now of course there are groups that eat it all up study it and those guys are real fun to coach.