Watching long drawn out videos are bound to bore anyone, even good ones like the daygame blueprint. We as humans weren't designed to sit and watch lectures, we were designed to be doing something. I'd say you're completely normal in this regard.
As for the infield stuff, I really don't think you need to remember ANYTHING infield. You should forget everything you've learned when you approach and do your thing. The best time to think about what you've learned is after. When you get back home, reflect on your approaches and then try to integrate them with your knowledge. Think "oh, this didn't work out, maybe I should try this next time" and so on.
If you're thinking about what you've learned in-field that you're in your head, and for the girl, that is boring. She wants someone that's in the moment, not off somewhere else.
Also, how do you go playing video games? I'm guessing that when you're playing video games you don't get bored after 15 minutes and start to fidget. That's because you're into it and enjoying the game. Daygame is the best game there is, with greater rewards than any video game. I guarantee that if you have fun infield you wont find yourself getting bored.