Well here is how you can look at that:

Yes you should be able to learn some like that...to a point. How do you think that you learn when you learn from your guildmaster? It's not just you sparring with him; it's you watcher what a master does. There does come a point though where you have to learn on your own. Someone who is in shape can't just go out and beat any football/basketball/baseball player just from previously watching tv, but that is a way that you could learn the basics.