Not for those of you with slow internet connections I'm afraid as these are quite long videos . . . YouTube has more information than you ever needed or wanted to know about maple syrup.
This is from Wisconsin - some slight differences to the way I see farmers doing this in New England, (I've never seen plastic bags for collecting the syrup) but not that different overall. There are other videos at YouTube of more amateur setups. (Although I said don't do this in your kitchen at home, apparently some people do - though perhaps their kitchens were not that wonderful in the first place . . . ?)