Semi Homemade sideline replay system

I video the football and basketball games for my kid's small school. I focus on small school because we don't have the ton of money for all the Hudl sideline or other systems.

I use a sony video camera on a pole mount system. But would like to figure out a way the coaches can watch replays quickly. I purchased a cheap breakout box that converts hdmi signals to mp4 and puts it on a jump drive. But then to see a play you would have to take the jump drive out and put it in the tablet and find it, etc. It's just very clunky to do.

I'm thinking I could get a laptop and record off it then create my own network with an old wifi router I have and share that folder. I would still have to find an app or program to watch the clips on the ipad or tablet though. I mean the video player isn't good for slow motion and drawing. And it has to be easy enough for a non tech person to use.

Anyway, anyone have ideas for this other than the school paying out $1500+ subscription fees a year? I feel like It's doable but thought someone here may have a solution or enjoy thinking about it.